What about players you can't stand?
Football:
Steven Gerrard - epitomises Liverpool football club.

Joey Barton - what a thug
Mario Balotelli - crazy and annoying. Wish he would play outside the EPL
Hockey:
Milan Lucic - cheap shot shithead
Sidney Crosby - what a little bitch
Rugby:
Richie McCaw
Ma'a Nonu
Most All Black players actually (awaiting Demolition23)
Basketball:
Lebron James - I don't even follow the game that much but this guy irritates the hell out of me.