I've thought of more things that bug me. It makes me nutty when someone is telling a long story with dialogue and instead of saying "she said... and then I said...", they say "then she goes.... and then I go..."
I don't like it when people say "I could care less" when they mean "I couldn't care less"
Someone above talked about mispronunciations and someone else talked about poor grammar. They bug me too. Misspellings are annoying.
Some accents bother me. I used to cringe when hearing a Southern accent, but now I like it. And now I like it when someone tells me to have a blessed day. We also get "Yes ma'am" and "No ma'am" here. We didn't hear that too much where I used to live and I think it's nice.