Liars are annoying, since I don't want to have to wonder if their lying to me or not. I just assume that they're alway lying, and stop contacting them all together.
Greed ain't so bad, since it can be confused for ambition.
My truely, biggest pet peeve of all, is people with no sense of humor. Take note, that humans are the only spieces on Earth that have humor. So, besides other things, it's what seperates us from the animals
That and racism. I think my store manager hates mexicans. Got to get her fired or demoted before I leave that place...