I hate

Personally there is nothing I like more than leaving some mug for dust behind me, then 20 seconds later start watching them stew in my mirror because they object to me driving at only 30 mph in a 30 limit.

Must admit I've done this though. Generally I enjoy speed limit driving although the problem is people overtake you in dangerous places to go very sightly faster, because they pay road tax goddamns it so they have every right to break the law or something.