1. PEOPLE WHO DRIVE IN THE PASSING LANE NEXT TO SOMEONE DRIVING LESS OR EQUAL TO THE SPEED LIMIT.

2. PEOPLE WHO DRIVE WITH THEIR BLINKERS ON OR EMERGENCY FLASHERS WHEN THEY SHOULDN'T.

3. My wife, who has been having a conversation with herself for 10 minutes, THEN starts speaking out loud to me and I'm supposed to figure out what the heck she been thinking about for 10 minutes...VERY FRUSTRATING.

4. My daughter changing the radio station in my car when she thinks I'm not looking.

Could probably add 20 more, but you said only three. Another pet peeve... people who don't listen, don't hear...ahhh.