I'm not a fan of Dragonite. My issue with it is the evolution chain. The first two forms (Dratini and Dragonair) remind be of Asian Dragons, but when they hit their final form, the become Puff The Magic Dragon... What? I was never a fan of Mewtwo either. I know he's supposed to be a genetic experiment and all, but he always sort of creeped me out. That, and the ravenous fan base that demanded him in Super Smash Bros sort of annoyed me too...
While I'm on the topic of legendaries, I guess I also dislike the "little" legendaries. Mew, Celebi, Jirachi, and so on just felt a little, off. I While I understand the whole "Big Power in a Little Package" idea, I feel at this point, they're there simply for the anime. Every generation has one (or two if you count Phione) and in a way, they sort of feel like the Pika-Clones to me.