Anime:

• Angel Sanctuary
• Yu Yu Hakusho
• Steel Angel Kurumi (Only the first season--my God, personally, I thought the second season was awful. D: )
• Fruits Basket
• Sailor Moon
• Ouran High School Host Club
• Elfin Lied
• Nightwalker
• Honey and Clover (Kind of a love/hate relationship when it comes to this series.)
• Paranoia Agent
• Ranma 1/2
• Vampire Princess Miyu

Manga:

• Angel Sanctuary
• Kare Kano: His and Her Circumstances
• Fruits Basket
• Hana Kimi
• Kare First Love
• Confidential Confessions
• Eerie Queerie
• DNAngel (Love/hate relationship with this series, too.)
• FAKE

Above all of those I enjoy, Angel Sanctuary is the one series I absolutely love and adore. <3