People who suck up to other people in order to gain power/fame. This logic applies to my school for example, as some people hound the popular kids in order to advance their "reputation." Acts like this honestly disgust me, and I just shake my head to people who do that.

People who are unaware of even the most basic definition of "Right of way". Especially at stop signs

people in general

people randomly telling me their life story when we just met either because I happen to sit next to them or have to work with them for a class thing.

when people talk to much

Not being able to hit that part of puberty where my voice deepens. Then no one can call me a squeaker! BWA HA HA HA ha oh who cares.

Pretty much everything that's been said...

-Little kids on the internet (when socializing or trying to grab attention, example: YouTube channels). Browsing the web and playing games is different, as long as they're not being annoying.
-Little kids on Xbox 360 games like Halo: Reach/Halo 4. Especially when they use mics...
-Saying something, specifically a detailed story, but then having to repeat it several times cause someone or some people didn't hear.
-When I try to get my parents attention while I'm downstairs and they're upstairs or the other way around, they tell me to go upstairs/downstairs (depending on circumstance) if I want to talk to them. Then they go and try to get my attention while I'm downstairs and they're upstairs, or other way around. Complicated to explain, but an easy concept that pisses me off.

Pet Peeve forum posts.

When People Type Like This. It seriously makes me say it like "When. People. Type. Like. This."

Also when people use the wrong there (their, they're), to (two, too), your (you're) or where (wear, were) etc.

There are many more.

When you can't prove to people you've changed as a person.

That moment when you come across the person you hate but in reality they are your best friend.

I have another.
When you can't go to sleep right before the first day of school.

When you find out you're good at something but you hate doing it.
It's like you feel guilty for not pursuing it because you're gifted in it but at the same time you're miserable when you do it.