People chewing with their mouths open omfg. And when people try to sing the words to a song they don't know.
Haha, I agree with so many of these! Slow walking people annoy the hell out of me, I don't run everywhere, but c'mon, I want to get to places! People who moan about their life and don't realise how lucky they are. People who are impolite... The words 'please' and 'thank you' never hurt anyone.