Let's see... I've done Reno from FFVII, Fem!Captain Hammer from Dr. Horrible's Sing-Along Blog (not anime/manga, I know, but I went to a convention with it), and I did Hikaru Hitachiin from Ouran High School Host Club.

I'm working on making an America/Alfred cosplay from Axis Powers Hetalia right now, and I need to get started on my Repo Man costume from Repo! The Genetic Opera. That second one is also not anime/manga related, but it's one that I've almost been demanded to make at this point to wear to my friend's Halloween wedding next year.

I've got a list of other costumes I'm planning on doing eventually, but I can't think of any of them at the moment. I really need to get to work on some of those.