Light, because he kills people.
Sebastian Michaelis, for sheer awesomeness.
Inuyasha, because he's a badass.
Monkey D. Luffy, because he's batshit crazy.
Ed Elric, because he doesn't like putting up wih other peoples sh*t.
Don't like:
Vash from Trigun, because he won't kill anybody which is annoying.
Nami from One Piece, because she is annoying as hell, always being a b*tch.
Sanji from One Piece, because he is totally whipped by attractive women.
Rokujou Miharu from Nabari no Ou, because OMG don't watch that anime it f*cking sucks.