Tell who's the dis-liked characters in the UFC. Mine are...

Tim Sylvia - Boring, steroids too
Gonzaga - Can who got lucky
Sherk - cheat who shouldnt be getting a title shot so soon.
Serra - cocky and is going to be put in his place by GSP.

Nick Diaz - Good fighter but to damn cocky for me. He needs to take after his brother.

Some of my most disliked fighters have already been mentioned (not surprisingly). Anyway, here's some of mine:

Tim Sylvia - Bleh.
Brock Lesnar - Monster fighter, but his antics irritate me.
Josh Koscheck - Never liked him. Seems like a jerk to me.
Tito Ortiz - Jerk.
Michael Bisping - Ahhhhhh! My least favorite fighter, by far.

Well I would go with Brock Lesnar...I don't like him at all...He is a good wrestler but the thing is my perception about him has never changed in my entire life...When he joined the UFC i used to dislike him and it is still going on...