I've getting sick of people looking at my car. It has a dent in the side and whenever I pull up alongside someone they'll just gawk at it until it's time to move. A quick glance I could understand, but these fuckers literally stop and stare. It's not even too bad a dent : /
People who take ages to do stuff also pisses me off. Like, my housemate will say "let's watch a film!" and I'm ready in minutes, sat on the couch with it all ready to go and then he'll go "I just need to take a shower and get changed and then I've got to call my my mum and then I need to sort some food out". I can be sat there for about an hour after which time it's too late to start the film.
Also, at work when people next to me leave, they'll say "See you tomorrow" but then proceed to still be here 15 minutes later packing their stuff away. Say goodbye when you're actually leaving, FFS >: (
Also also, people who say "oh, I haven't had a drink for *X number of days*. I'll need to rectify that this weekend!". Why do we need to know this? I mean, I haven't had a Twix for about a month but I don't tell people about it.