1) People who drive too slow in the FAST lane and all assosiated things. Don't tell me there's no fast lane in NZ - everybody knows that the right lane is the fast or passing lane so if you pull out to pass then do it.... Then PULL THE F&*k BACK OVER!!!!
True, but it does say explicitly in the road code (and on signs all over the place) "Keep left unless overtaking". So people have no excuse.
What annoys me even more is when people drive at 80 on the open road, then decide to speed up to 110 once they're on a passing lane. Happens all the time. F%$&*n annoying.