I can't stand people that snap their gum!
My refrigerator has to be clean and organized. No old food.
Can't stand when someone eats like a pig.
Always open public restroom door with a paper towel! Do you know how many people have touched that door handle and not washed their hands and do you know where their hands have been. Also hate the blow hand dryers.
A barking dog. Funny how the owner can't hear them.
Screaming kids.
I guess I could go on and on.