Seen:

Gurren Lagann - <3
Steamboy - Have this on DVD :P
Fullmetal Alchemist Brotherhood ~ Didn't finish
D.Gray Man ~ Also didn't finish....
Howl's Moving Castle
One Piece
Last Exile ~ Never finished it....maybe I should...I did really like it.
Cowboy Bebop - Definitley one of my faves. Loved the theme tune.
Ergo Proxy ~ Never finished it either, liked it though.
Princess Mononoke

Not seen:

Samurai 7
Tegami Bachi
Robot Carnival
Castle in the Sky
Gankutsuou : The Count of Monte Cristo
Origins: Spirits of the Past
Hellsing Ultimate

I reckon I'm going to restart watching Last Exile and finish it this time :)