I hate tailgaters....in fact i when i get them i tend to slow down quite a bit...and hopefully go neck and neck with the fellow in the other lane (if it is a 4 lane highway)...pisses those wankers off.
I also hate people who get out of their car at stop lights to converse with people three cars behind them...nad then slowly amble back three green lights later.
and I hate those bastards talking on their cell phones when they're suppose to be minding the road.