When people start fiddling on their phones or tablets while you're having a conversation and then they have to ask you to repeat because their attention was pulled away. And then they do the exact same thing seconds later. It's like watching a fly with a light bulb. Put it away!

Also people who give no thought to cleanliness or manners. Sneezing or coughing into the air without covering their mouth, picking their nose, handling clean dishes without washing their hands first, etc.

A weird one I have is about people around my food. When I'm cooking or making food it makes me irrationally ticked off when people mess with it at all, or really if they're around me at all at the time. Someone will adjust the heat of the oven or stove without asking, or they'll move something I'm using. If they move a cup I'm using, or touch my plate... it doesn't matter if they're careful or practice proper hygiene, it makes me really mad and I don't know why.