Ganondorf, Fox, DK. He sweats 'cool'. His voice, taunt, moves, style, etc. and yes, this sentence applies to all characters.
Always liked Zelda games, and the fact that i can play as the Evil King of Darkness is just awesome. Win or lose, i never not have fun playing Ganondorf.
Starfox on the SNES was just short of a religious experience for me. StarFox64 still ranks as the BEST space shooter i have EVER played. But the real reason i like fox is something so nerdy, you have to sit down and restrain your hands from facepalms. He reminds me of DBZ. Fox Air, his voice, the way he moves...i just think, "Wow, i am SO going super saiyan on your arse."
Donkey Kong has the rap. Also, having my arse repeatedly smote during the 64 days by a really good DK player made me love him. His taunt is cool, carrying opponents is awesome.