Oh man, so many. I try not to get annoyed, but repetition is the easiest way to have that thrown out the window. Just work retail, and you'll have your own list. Or, go to college.
I'm pretty much annoyed by the majority of questions you here after a professor announces that there is going to be a test. Such as, "Are there going to be any trick questions?" or "Can it be multiple choice?"
There are definitely certain words that annoy me when spoken aloud, but I usually just chalk it up to that individual's inability to form a coherent, proper statement or question within the terms of a mature conversation and therefore do not blame the word but instead the person.
Aside from the words already on the table, I can't stand when anyone over 18 years old uses a "watered down" version of a swear word (i.e. A-hole instead of *******). If it's situationally inappropriate to swear, then sounding like a five year old trying to keep himself out of trouble is only going to create an aura of immaturity, not a pat on the back for being polite. If you are in a setting where you're permitted to let a few four letter words loose and you tell me someone across the room is an "A-hole," I'm not going to nod, agree, and rub your bottom - I'm going to laugh in your face for having your balls in jar someplace far, far away from where they once were.
That little tidbit said, where do you go to school that your profs don't fail you for typing out incorrect homonyms? That's what gets me more than anything that someone might say. Conversation is a give and take where an individual may not have time or be paying enough attention to what he's saying to avoid a slip up. However, when you're typing you can see what you're saying right in front of you, and especially within as small a statement as you typed, errors should be easy to avoid. It's not like I don't make mistakes as well, but come on, you're supposed to be college edumacated now.
However, I do applaud you for using proper punctuation, capitalizing where appropriate, and not writing your entire post as a giant run-on sentence. I also hear you about the slower members of a class and their inability to grasp some concepts. Maybe if Polly Pocket all grown up over there wasn't texting "lolz" on her glittery phone for the entire fifty minutes of class she would know that the supply curve is the one with the positive slope and yes, all the questions on her test are going to be tricks because she doesn't know what's going on.