Bad drivers make me want to fish-tail them, take there drivers liscense, and burn it right in front of them. I'm still a pacifist though.
On a lighter note...
Hypocracy
Inane fear (not really sure why)
Self proclaimed experts
People who cannot change
"Acha que é o dono da verdade"
(hope you don't mind if I steal that one little tipper)
Greed
Obvious lying