I have three main pet peeves:
1. The cocky, overconfident people who think they're God's gift to the world and can't admit that they make mistakes or are sometimes wrong
You don't know how much I agree with you on that. I know 3 people like that. 2 of them are extremely bad. I try to stay friends with them, but I've given up hope on of the really bad ones.
Besides that, my pet peeves are:
1. Major hypocrites. (We all do hypocritical things occasionally, I just hate those who are constantly hypocritical)
2. Major Religious People. (Religion is good, but when you try to force it down others throats, hate people of other religions, constantly talk about religion, etc etc, that pisses me off)
3. People with BO. (Take a shower for the love of God, no one wants to spend time with someone who smells like a dick smothered in semen, anal juice, rotten eggs, and a dead ferret)
4. Extremely clingy people. (This doesn't just apply to girls, I know one guy who was in my Chemistry class last year...lord he pissed me off)
5. Old people who can't drive. (I'm not saying all old people can't drive, it's just the ones who suck at it but fail to realize they do)
6. People who do stupid shit that causes you to run into them, then they look at you like your a fucking dumbass and they want to fight you. (For example, your walking down the hall, you see a guy talking to a girl, then right when your at his side, he flails his arms around like a retard, you run into his arms, then he stares you down like he wants to murder you.)
<_< Ok so number 6 was quite specific, but it's more general then you think.
As a note, I could give you an example of someone I know that fits those perfectly.