So, who is your all time favourite anti-hero? I mean those mean, evil, cool, sadistic looking guys who are not morally good and do not behave like typical heroes, but still, they are part of the good side in the story.
Mine fav ones are Alucard and Father Alexander Anderson, both from Hellsing Ultimate. Alucard is quite a blood-thirsty, sinister vampire and his rival, Anderson is not much different when it comes to having twisted ideologies. I find them both cool and superb anti-heroes to have in anime.
Besides them, I'd say Hajime Saito from Samurai X also had quite some characteristics to be considered an anit-hero. I liked his fighting style and also his cold, shitty attitude.
Also, Vegeta from DBZ. I liked his arrogance as well as his pride. He's one tough dude you don't want to mess with.