Whooo. This is gonna be a VERYYY long list:
L -- Death Note
Everyoneeee -- Hetalia, Junjou Romantica, KKM, Ouran Highschool Host Club and Vampire Knight!
Zuko -- Avatar. Lol.
Sebastian, Ciel, Grell -- Kuroshitsuji
Goku -- DBZ xD
Flapjack -- The Misadventures of Flapjack
Ichigo, Uryuu...