People in public eateries talking so loud I can hear their entire conversations. Bugs the crap out of me.

People interrupting me when I'm talking or on the telephone.

Not saying thank you.

The idiot that always seems to be parked next to me at the traffic light with the music blaring and his windows down so loud that it rattles my car.

Loud talking during in a movie theater. Actually loud anything in the movie theater.