I hate:
-When semi-trucks or other slooooooooow vehicles pull in to the passing lane and just SIT THERE! Come on people! It's called the passing lane for a REASON!
-When my brother feels the need to tell me about his sex life, yuck.
-When I waste my energy on liking a boy but I finally give up. Then as soon as I do, well, guess who's now interested in me?
-When people assume I am stuck-up without taking any time to actually get to know me
-When people POINT OUT the fact that I have ADD....wow, tell me something I DON'T know!
-People who brag
-Annoying pop up windows that make my computer go psycho
-When my nail polish chips just hours after it's been put on. Arrgh.
-People from home who seem surprised when I tell them that I haven't dropped out of college like everyone else that graduated with us.
I'm sure I have more, but these are all I can think of for now.