People who take infants and toddlers to adult movies. We saw Star Trek the night it opened and there were three infants in the theater. Get a damn sitter or Netflix the movie.
People who say "feel" when expressing an opinion. I don't care how you feel. I'd like to know what you think.
People who won't admit they made a mistake when they clearly have and/or try to blame someone else for their short comings. I lose respect for a person when they say "but it wasn't my fault!".
Blowing one's nose at the table. Also sniffing constantly rather than getting off your dead ass and getting a tissue.
I'm starting to think "People" is my pet peeve.