1- Nick Diaz, Nate Diaz (while taunting, showing the "bird" or calling opponents bitches + post fight interview)
2- Jon Jones
2- Rick arrogant Story, although Maia taught him a lesson already.
3- Hector Lombard
Basically, I tend to root against those I consider arrogants even when I know they are talented fighters.
PS: KO is part of the sport. Wishing for a KO does not imply wishing to someone to get hurt, although that is what happens.