Series:Death Note (I haven't seen all of it yet, but I do own the movie)
Elfen Lied
Love Hina
Chobits
Hellsing
Pokemon (Haven't seen every episode, but I do love my Pokemans, lulz)
Gravitation
Bokusatsu Tenshi: Dokuro-Chan
The Melancholy of Haruhi Suzumiya (Haven't seen the last few episodes, hard time finding them)
Urusei Yatsura
Kimi Ga Nozomu Eien
Tenchi Muyo (The original and Tenchi in Tokyo, but it's been a while since I saw it)
He's My Master (In progress)
Fruits Basket
Peach Girl (terrible art, the story isn't too bad)
Cowboy Beebop (from what I've seen, I like the movie)
Movies are a different story, there's a lot there, too.
I'm sure I'm forgetting something, but that's what I really like off the top of my head.