gonna have to say Penn vs. GSP...Penn did more damage...
This always bothers me. The eye-poke and the clipping of the nose did all the damage you are referring to. Is that enough to win him the fight when he clearly lost rounds 2 and 3? IMO this one wasn't even close. Even at the end of the first round, BJ is throwing looping hooks and GSP just moves to the side and lands some good jabs.
Rampage vs Lindland and Rampage vs Ninja were ones that didn't seem right to me.