If you've ever shared a house with someone you probably found they had annoying habits after awhile.
But do you do anything that makes you annoyed with yourself?
Mine would be saying "like" far to much when talking to people. I used to do it when I was a teenager but grew out of it. For some reason I've started doing it again. It really annoys me when other people do it, so I get cranky when I catch myself doing it.