The driver at the stop light who sees you coming in a 50 mph zone, nobody in your mirror for miles, waits and then pulls out at 30 mph.

The slow driver in the fast lane.

The driver who feels since they are qualified for the car pool they must use the car pool no matter how slow.

The running road block. Side by side all at 5 mph under the speed limit.

The "Oh, I must have been day dreaming because there's my exit and I need to get over 4 lanes. Everybody stop for me because I'm more important"
When there's two or more of these it's in slow motion reverse trying to get to the car pool lane.

The driver who stops then puts on the turn signal. Related to the driver who has to completely analyze where he's turning....TURN ALREADY!