Only thing I can think of at the top of my head is:

-When I see someone with a surround sound system that is NOT hung up on the wall. Instead, it's placed on the bloody TV stand or something. It's called surround sound for a reason ><

-"You're" being spelled as "Your"

-Any time I see someone saying what 'Real music' is & bashing everything else.

The squeaking sound that styrofoam makes.
When people forget to flush.
When people squeeze the toothpaste from the middle and not the bottom.
When people say "we" when referring to their favorite team.

My pet peeves:

1.I hate it when people smack their lips while they eat. (It's so annoying. My other brothers and sisters do it purposely to just annoy me sometimes.)

2.When people cut in front of other people in the lunch line.

3.I don't like it when people burp and don't say 'excuse me'.

4.I don't really like it when people ride the bumper of my mom's car. It makes me think they are going to ram right into our car.

There are many more, I just can't think of them of the top of my head right now.

- When people try to have a conversation with me while I'm eating. It really irritates me.
- When there's a group of people filling up the pavement and refuse to move out of the way even though you clearly need to walk by them.