What are some common pet peeves?

ADD your own to the BOTTOM of the list!

Couples who sit on the same side of the booth when there is no one on the other side.
Parents who bring their young kids to R rated films. People who blame anything but themselves for THEIR failure.
People who sit next to you on public transportation even when there are other seats available.
Noisy eaters.
Students who prolong class by asking the most inane questions.
Women who wear jewelry that clinks and clacks and makes noise when they're at their desk or keyboard.
When people take 20 napkins, use one, then throw them all away.
Going through the drive thru, then having to go back when they screw your order up.
People walking around in ridiculous 'fashionable' shoes that are clearly hurting their feet.
Whenever anyone says "Ya, know what I'm sayin"...
Using speaker phones in public areas at work.
Roadmaps that aren't folded correctly.
The way people walk in flip flops.
Someone standing over my shoulder reading the computer screen.
People who write "Noone" instead of "No one".
Explanations that begin with the word "Again".
People who don't cover their mouth while sneezing or coughing.
Dirty dishes in the sink.
People who habitually need favors.
People talking loudly on their cellphones in public
People talking or texting on cellphones while their friends are right beside them
People talking or texting on cellphones when at a register and someone is trying to help them with their purchases
People driving who wait until the last second to try to get in the lane that they knew they would need to be in ten minutes ago