I hate when people say:
pop
creemee
pellow
melk
There are so many things in this thread that I agree with.  Too many to remember but I will try my best:
People smacking their lips
People eating crunchy food
People driving with their blinker on
People that look at you when they think something is funny (my sister does it and it fucking pisses me off)
People that fake laugh at something whether it is funny or not
When girls scream at everything/ for no reason
People touching/ moving my shit
When all my food is touching (esp. on thanksgiving, I don't want my turkey to taste like cranberry sauce)
People that walk slow.
Haha that is a fairly good list, I may sound like a hypocrite for some of them, like looking at people when something is funny.  Everyone does it, I do it, but only when something is so funny that you are laughing your ass off.  Not at some stupid joke on tv and then the person stares at you with a creepy grin until you look at them.