I'm particularly fond of Sugisaki Ken from Seitokai no Ichizon. This guy got most of his character development done before the show even started. He's always going on and on about the HAREM ENDING, but once that has been seen through, here is a hardworking young man whose goal in life is to make all those he cares for in life happy. I highly respect that. The development he went through to get to where he is was highly respectable as well.Those Purple black striped pants are pretty cool too.
Kira from Death Note. He's such a powerful character.