Ok it's sort of similar to turn offs but a little different. This isn't about what annoys you about the opposite sex or why you wouldn't fancy someone.
It's just plain pet peeves.
Mine are:
1. People who use the word ignorant incorrectly. Ignorant does not mean to ignore. Grrr.
2. People with bad table manners. I cannot stand people who chew with their mouths open. It drives me nuts.
3. People who don't know their theres and they'res!!! (Sorry Han - you are a prolific offender!) Their - belongs to, There (he/she's over there or there has been a mistake), They're = They are.
4. People that leave cupboards open. When in the rare times my housemate empties the dishwasher he opens every cupboard in the kitchen and then leaves them open. I have to have everything closed.
on a totally random note- one thing that really pisses me off is the way that the condoms you get from the vending machines in club-toilets have a cellophane wrapper that is next to impossible to unwrap when you're pissed.
My mother has a tendency to talk with her mouth full (despite all the years of her teaching me not to do that). I really hate it. Swallow your food and then speak people, it's disgusting otherwise.
Another one is people having a shouting conversation rather than walking over to eachother to talk to them. Particularly annoying when people have shouting conversations between flights of stairs.