After a 10 hour road trip yesterday I would like to add to the things I hate.

Drivers that:
a: tap their breaks every 10 seconds while driving along
b: get into the passing lane and go 1/2 mph faster than the car they are passing so it takes them forever to finally move back over
c: seem to be trying to run you over, so you move over to let them pass and instead they change lanes to be right behind you again
d: or once they hurry up and speed past you they get in front of you and drop their speed to slower than what you were going in the first place

There are others but those are the worst in my book.