Loud noises (music, motorcycles, television, talking, trucks, etc)
Crowds
Flashing lights
Tardiness
Driving (particularly other drivers)
Waiting on hold for too long
Prime numbers, excluding two (don't buy three things, buy four or two, don't buy five things, get four or six, and so on.)
Commercials/adverts
Decisions being made for me
Non-smokers who sit in the designated smoking area and then complain about the smoke (I use these areas out of respect for non-smokers, they shouldn't intrude in the area designated for smoking if they are going to complain about it)