O_o I... erm... don't know what to say to that...

Another thing that ticks me off:
People who never show up to do stuff!
(*glares at certain person who hasn't been on for forever*)

I think I know who you are talking about, torchie. *uses telepathy to tell answer*

To be back on topic, I don't like it when there is excessive celebration over something that someone has done wrong. For example, I'm in gym class playing volleyball. My team has a bad serve, and the other team high-fives each other because my team is made up of non-volleyball players (including me) that cannot serve consistently. It just seems wrong! They did not do anything to win that point except watch us fail miserably.

Well, I find it really annoying when you ask someone to get something to grab something for you.
"Hey, can you get my headphones for me?"
"Sure! Just a sec."
*30 min. later*
"Dude, where are my headphones?"
"Huh? Oh yeah! Just a sec."
Wash rinse, and repeat, until you get mad enough to get them yourself.

Also, I can't stand strangers that constantly ask
"What <insert medium of entertainment here> are you <insert method of entertainment here>?"
Response: ...
"Hello? What are you <insert method of entertainment here>?"
Response: ...
"Fine, I'll just get in your face and annoy you until you cave and tell me something that I will most likely not care about." (That last one was the action.)