I would totally join this list!

...if my manga collection wasn't still between two places right now. ^^;

When I have everything moved into the new apartment, I shall enjoy sharing the list of manga that frightens my mother on a regular basis. :P

Anime:
Peacemaker Kurogane box
Gravitation box
Aquarian Age box
Yami no Matsuei box
Ninja scroll box
Getbackers complete
Howl’s moving castle
Spirited Away
Metropolis
Cowboy Bebop movie
Tokyo Babylon
Level C
Saiyuki (vol 1)
Gundam Wing (vol1)
Akira
Ninja scroll movie
Vampire Hunter D
Geobreeders
X + X ova
RG Veda
Vampire Princess Miyu
Pretear (vol 1)
Spiral (vol 1)
Kenshin (vol 1, 2, 3)
Bubblegum Crisis (vol 3, 4)

Manga: (no numbers = complete)
X/1999 1-18
xXxHOlic 1- 7
Legal Drug 1-3
Tokyo Babylon
Yami no Matsuei 1-11
Death Note
Loveless 1- 7
Trinity Blood 1-3
D.Gray-man 1-6
Naruto 1-15
Godchild 1-6
Ouran Highschool Host Club 1- 9
Meru Puri
Hands Off 1-7
Peacemaker Kurogane 1-4
Gravitation
Gorgeous Carat 1-4
Suki
Wish
Duklyon
Shirahime-Syo
Miyuki-chan in wonderland
Sensual Phrase 1-5
Paradise kiss
Nana 1-11
Junjo Romantica 1-2
Tactics 1
Wild Rock
Shinobu Kokoro
Ghost Hunt 1-4
DNAngel 1-4
Shaolin Sister 1
Cardcaptor Sakura
Alice 19th 1-4
YugiOh 1-3
Color
Immortal Bird
Gakuen Heaven
Dear Myself
Only the Ringfinger Knows
Our Kingdom 1
Passion 2
Lost Boys
Challengers
Rising Storm
Tenshi no Hitsugi
Princess Ai 1-2
The Dreaming
Red Moon 2-5
Gundam Wing Endless Waltz
Gundam Wing Battlefield of Pacifists
Fake 1-3

I've never posted here before? O.o

Anime boxsets
Lovely Idol
Rozen Maiden
Rozen Maiden Traumend
Ouran High School Host Club
Card Captor Sakura
Slam Dunk
Dear Boys
Fruits Basket
Full Metal Alchemist
Fell Metal Panic
Weiss Kreuz
Prince of Tennis
One Piece
D Gray Man
Code Geass
Chobits
Tsubasa Chronicles
Pretear
Serial Experimental Lain
Rozario + Vampire Capu Chuu
Futakoi
Love hina
Yumeria
Evergence Eve
Gokusen
Xenosaga
Gakuen Heaven
Marginal Princes
Gundam Seed Destiny
Magical Canon
Maburaho
Whistle!
Magikano
To Heart 2
Gift
Soul Link
Izumo
The Violinist of Hameln
Gravitation
Blood+
Happy Lesson
Tsukihime
Ragnarok
Yami no Matsuei
Full Metal Panic 2nd raid
Digicharat
Comic Party

Anime Movies
All them pokemon movies ^^"
Howl's moving castle
Digimon movie
Card captor sakura movies

Manga
I don't read manga ^^"

Uhm, wow. You all have me beat by a lottt. Anyways:

No anime. :/

Anime Movies
Howl's Moving Castle
Voices of a Distant Star (I love this movie <3)
One or two Pokemon
Final Fantasy VII

Manga
.hack//sign (practically every manga/half-novel that they've made for this, I love it xD)
Kingdom Hearts
Shaman King
DNAngel

So, as you can see, your list sizes definitely beat mine.

Anime
Spirited Away
Final Fantasy VII: Advent Children

Manga
Castlevania: Curse of Darkness vol.1 [from Momo. <33 She knows who she is.]
Yu-Gi-Oh! The Movie Ani-Manga

I am not a big manga/anime collector, as you can see.

@LalaAbc123 I am guessing those are in japanese? Because Miho Obana has only come out with Kodomo no Omocha over here(US)! T^T

I have a new and updated list (everything new is not in quotes):
Manga

Ororon (1-4)
Pet Shop of Horrors (1-10)
Pet Shop of Horrors: Tokyo (1-3)
Alice 19th (1-7)
Crescent Moon (1-6)
Battle Royal (1-2)
Planet Ladder (1-3)
xxxHolic (1)
GTO (1)
Fruits Basket (1-4)
Immortal Rain (1-7)
Demon Diary (1-7)
The Tarot Cafe (1-3)
Alichino (1)
Death Note (1-12)
Othello (1-7)
Densha Otoko (1-3)

Loveless (1)
Wild Ones (1-4)
High School Debut (1-5)
Ouran High School Host Club (1-11)
Rayearth (1-4)
Sugar Princess (1)
Mixed Vegitables (1)
Beauty is the Beast (1-5)
Tail of the Moon (1-2)
Wanted
Love.com (1-2)
Yume Kira Dream Shoppe
Real Bout High School (1-4)
Backstage Prince (1)
B.O.D.Y. (1)
Fushigi Yugi The Mysterious Play (1-8)
Beauty Pop (1-2)

Anime

Ranma 1/2 (many)
Saiyuki (all)
Mysterious play (1-3)
Princess Mononoke
Spirited Away
Knight Hunters (1)
Cardcaptors the Movie
Hellsing (all)
Ah! My Goddess the Movie
Hyper Police (1)
Full Metal Panic (1)
King of Badit Jing (1)
Melty Lancer

Gravitation (all)
Kaleido Star (all)
Kaleido Star New Wings (all)
Pretear (all)
Cased Closed (all)

Wooow, I thought I had a lot ^^;

Manga:
Bizenghast
Pita Ten
Death Note
PhD
Kindgom Hearts
.Hack//Legend of the Twilight
.Hack//G.U+
Devil May Cry3
Last Fantasy
Monochrome Factor
Magical x Miracle
Tarot Cafe
Claymore
Zombie Loan
Free Collars Kingdom


I only buy anime movies:
Sky Blue
Akira
Howl's Moving Castle

Okay, here goes nothing...

Manga
Fruits Basket (vol. 1-22)
Tsubasa RESERVoir CHRoNiCLE (vol. 1-5,7)
Ouran High School Host Club (vol.1-6)
Wallflower (vol. 1-3)
Dramacon (ultimate edition)
Naruto (vol. 1-3,6)
Kingdom Hearts (vol. 1-2)
Kingdom Hearts: Chain of Memories (vol. 1-2)
Kingdom Hearts II (vol. 1-2)
Return to Labyrinth (vol. 1)
Tsubasa: Those With Wings (vol. 1)
Chrono Crusade (vol.1)
Inverloch (vol. 1-2)
Earthsong (vol. 1)

Anime
Naruto (vol. 1-4)
Fruits Basket (complete)
Legend of Zelda (complete)
Howl's Moving Castle
Spirited Away
Death Note (first episode on iTunes)
Final Fantasy Advent Children (if that counts)

I also have an episode or two of Cardcaptor Sakura on VHS. I got it for $0.25 at CVS. Can't beat that. : )

All right, here's my Manag collection;
Alice 19th
Birthday
Bleach
Blue Inferior
Bobobo-bo-bo-bobo
Cardcaptor Sakura
Confidental Confessions
Digimon
Fullmetal Alchemist
Hyper Rune
InuYasha
Kamichama Karin Chu
Kingdom Hearts II
Magic Knight Rayearth
MAR
Naruto
No Need For Tenchi
Pita Ten
Sgt. Frog (Keroro Gunso)
The All New Tenchi Muyo
The Legend of Zelda Ocarina of Time
The Ring
Tokyo Mew Mew

(We have over one hundred and ten books XD)

I only have a few cuz I get most of them from the library:

Mangas:
volume 23 Fruits Basket
volumes 3 and 4 Death Note

Anime:
2-5 Book 1 Avatar

My manga:

Absolute Boyfriend (1)
Angel Sanctuary (1)
Chobits (1-4)
Dazzle (1-10)
D.N.Angel (1-8)
Godchild (1-2)
Hana Kimi (1-2)
I.N.V.U. (1&3)
Kill Me Kiss Me (1-2)
Les Bijoux (1)
Loveless (1)
Model (1-3)
Nana (1)
Ouran High School Host Club (1-8)
X-Day (1-2)

Angelic Layer (1-5)
Cardcaptor Sakura (1-4)
Chobits (1-8)
Code Geass (novel, 1)
Confidential Confessions (1-5)
Death Note (1-9)
Diabolo (1)
D.N.Angel (1-8)
Dramacon (1-3)
Figure 17 (1)
Fruits Basket (1-6)
Fullmetal Alchemist (1-8)
Gravitation (1-4)
Gundam SEED (1-5)
Gundam SEED Destiny (2)
Gundam Wing Episode Zero
.hack//A.I. Buster (novels, 1-2)
.hack//G.U. (novel, 1)
.hack//G.U.+ (1)
.hack//Legend of the Twilight Bracelet (1-3)
Hellsing (1-2)
Inuyasha (1-2)
Kingdom Hearts: Chain of Memories (1-2)
Loveless (1-8)
Magic Knight Rayearth (1)
Naruto (1-2)
Orphen (1-2)
Ouran High School Host Club (1)
Priest (1-17)
Psychic Academy (1-10)
Ragnarok (1-3)
Rebirth (1-5, 8)
Rurouni Kenshin (1-6)
Shaman King (1-7)
Trigun (1-2)
Trigun Maximum (1)
Trinity Blood (1-4)
Trinity Blood: Rage Against the Moons (novels, 1-3)
Trinity Blood: Reborn on the Mars (novels, 1-2)
Tsubasa (1-20)
Vampire Hunter D (novel, 1)
Vampire Knight (1-5)
xxxHOLiC (1)
The Wallflower (1)
Yu-Gi-Oh! (1-5)
Yu Yu Hakusho (1)

Plus some old Pokemon and Sailor Moon comics-but-not-graphic-novels.

Edit: Ah, shoot. Didn't put my anime. There's less of that, though. *coughlegallycough*

Angelic Layer (Whole series)
The Animatrix
Cardcaptor Sakura (Old dub VHS ^_^)
Final Fantasy: The Spirits Within
Final Fantasy VII: Advent Children
Fullmetal Alchemist: The Conqueror of Shamballa
Ghost in the Shell
Gundam SEED (First half)
Gundam Wing: Endless Waltz
.hack//Legend of the Twilight (Whole series)
Howl's Moving Castle
IGPX (First DVD)
Kimba (Some random DVD from WalMart)
Monster Rancher (Dub VHS!)
The Melancholy of Haruhi Suzumiya (First DVD)
Pokemon (The first two movies and a VHS with episodes)
Princess Mononoke
Princess Princess (Whole series)
Sailor Moon (A bunch of old VHSs)
Samurai X (Whole OVA collection)
Vampire Hunter D
X (The movie)
Yu-Gi-Oh! The Movie

lol I have tons.

Manga / animes:

Bleach
Pokemon
Saki
Lucky star
DN angel
Fruits basket
Special A
Gakuen Alice
Ouran high school Host club
Card captor Sakura
Tsubasa
xXHolic
Kamichama Karin
Kamichama Karin Chu
Pita ten
Hack
Chobits
Inyusha
Vampire Night
Kingdom hearts
Fallen Vampire
Nuu

Anime movies:
Pokemon
Spirited Away
My neighbor Totoro
Princess monoko ( It's so gory DDD: )
Castle in the sky
Howl's moving castle
Kiki's delivery service
Naucisa ( I don't really know how to spell it )

Warning! Long list is long.

~Manga~ (not including one-shots)
.hack//GU+
.hack//Legend of the Twilight
.hack//xxxx
Absolute Boyfriend
AOI House
Alichino
Captive Hearts
Confidential Confessions
Confidential Confessions: DEAI
Death Note
DNAngel
DramaCon
The Dreaming
Emma
Fruits Basket
Fushugi Yugi
Hana-Kimi
Hibiki's Magic
Honey Hunt
Il Gatto Sul G
Imadoki!
Kyo Kara Maoh!
Last Hope
Loveholic
Loveless
Marmalade Boy
Meru Puri
Millenium Snow
Mixed Vegetables
My Cat Loki
Nana
Naruto
Only the Ring Finger Knows
The Other Side of the Mirror
Ouran High School Host Club
Paradise Kiss
Phantom Dream
Rolling
Sand Chronicles
Shugo Chara
Trinity Blood
Tsubasa: Those With Wings
Vampire Knight
With the Light
xxxHolic
Yu Yu Hakusho

~Anime~
.hack//Legend of the Twilight
.hack//Liminality
.hack//Roots
.hack//Sign
Air
Angelic Layer
Aquarion
Azumanga Daioh!
Beck: Mongolian Chop Squad
Comic Party(the original)
DNAngel
Emma: A Victorian Romance
Escaflowne
Fruits Basket
Fullmetal Alchemist
Get Backers
Gravitation
The Melancholy of Haruhi Suzumiya
Ichigo Marshmallow
Kaleido Star
Kino's Journey
Kurau Phantom Memory
Kyo Kara Maoh!
Little Snow Fairy Sugar
Loveless
Magic Knight Rayearth
Maria Sama Ga Miteru
Marmalade Boy
Mushi-Shi
My Santa
Naruto
Neon Genesis Evangelion
Paradise Kiss
Princess Princess
Rozen Maiden
Slayers
Star Ocean EX
Sukisho!
Super Gals!
Suzuka
Tsubasa Reservoir Chronicles
Voices of a Distant Star
The Wallflower
Wolf's Rain
Yu Yu Hakusho

My Manga:(not including one shots well beside fall in love like a comic but thats two books)

Red River
Hot Gimmick
Sand Chronicles
Fruits Basket
Bleach
Naruto
Saiyuki
Fushigi Yuki
Peach Girl
Never Give Up
Beauty Pop
Hana-Kimi
Chibi Vampire
Love Com ( Lovely Complex)
Yu-Gi-Oh
Gacha Gacha
Kitchen Princess
Fall in Love Like a Comic
Rosario+Vampire
Tramps Like Us
Yurara
Miki Falls
Hell Girl
Pretty Face
S.A
Devil Princess
Loveless
Walking Butterfly
XXXHolic
Queens Knight
The Devil does Exist
Fairy Tail

My Anime :
Bleach Season 1
Storm Hawks (lol i guess)
Vampire Princess( almost whole series)
Chance Pop Session (full series)
Naruto 1-7(dvd's not box sets)

mine is:

+Anima
Chibi Vampire
Chrono Crusade
D.Gray-Man
DNAngel
Dark Hunger
Dark Moon Diary
Demon Diary
Dragon Ball Z
Dragon Knights
Fall In Love Like A Comic
Fruits Basket
Get Backers
Gothic Sports
Gravitation
Gravitation Ex
Inuyasha
Millenium Snow
Mugen Spirel
Naruto
Nora
Ouran High School Host Club
Princess Ai
Re:Birth
Replay
Rosario+Vampire
Rurouni Kenshen
Saiyuki
Saiyuki Reload
Tail Of The Moon
The Tarot Cafe
Tokyo Mew Mew
Tsabasa Resivour Chronicals
Vampire Game
Vampire Kisses
Vampire Knight
Vassalord
Wolfs Rain
YuYu Hakusho

-Naruto (i have alot!)
-07 ghost
-Future diary
- others i am to lazy to list :sarcasm:

LOL-this will be long haha
Extensive Manga Collection

Gravitation - All 12 Volumes - 2 Novels
Elemental Gelade- 1-4 Anime DVD Vol. 1 [lost interest]
Category:Freaks- 1-3 [probably discontinued series]
Kill Me, Kiss Me- All 5 Volumes
Monochrome Factor - 1-4 [waiting for 5]
Death Note- 1-7 [stopped reading after L dies]
D.Gray-Man- 1-14 [waiting for 15]
Saiyuki-1-2 [stopped collecting coz I watched the anime]
Bleach 1-2 [hate the series but it was a birthday present
NOW 1-4 [can't find new volumes in stores]
Lagoon Engine 1-2 [I need to start collecting again
Candidate for Goddess 1-2 [need to get the DVDS-don't like the manga much]
Final Fantasy Unlimited- Complete DVD box set
Juvenile Orion- 1-5 [also probably discontinued]
Psychic Power Nanaki- All 3 Volumes
Sequence- Single Volume
Nightmare Inspector- Vol. 1 [got bored with the story]
Card Captor Sakura - Vol. 4 [old print that was on sale for $1]
Tsubasa Resevoir Chronicles- 1-5 [I need to get back into it]
DN Angel - 1-3 [saw the anime so I stopped collecting]
Demon Diary- 1-6 [I ONLY NEED ONE MORE VOLUME, I AM SUCH A PROCRASTINATOR]
Princess Ai- Vol.1 [read vol 2 but never bought it an then I never wanted to...but it was a good manga]
Vampire Doll- 1-2 [got bored. Don't like man trapped in lady body XP]
Il Gatto Sul G- 1-2 [I need to get 3 haha]
Rurouni Kenshin-Vol.1 [I watched the anime]
Full Metal Alchemist Vol.1 [I tried to get into it but I couldn't hop on that bandwagon.
Gamerz Heaven- 1-2 [probably discontinued]
Kimi no Unaji Ni KANPAI! - 1-2 [discontinued because of religious views]
Escaflowne Movie DVD
Dragon Knights Vol. 1 [I wanted to get into for my friend but it got lame on vol. 2]

I'm sure I have more but I cannot remember them all. I think they are in storage...