What are the things that drivers do that annoy you most?

Lack of consideration, and thouse who think it is their right to speed, not thouse who accidently find themselves speeding or do because they are hurrying (not that it makes it right) but thouse who think they know best and are therefore entitled to speed, bully slower drivers, and moan like buggery when they get caught and fined.....you sped, you got caught, its your own fault....get over it!