i have a lot but i tend to not let on that something is annoying me and allow it to go on... so i'm not actually as bitchy of a person as this may suggest!
1. i hate when ppl offer to do something they think is nice, but i say 'no thanks' and they do it anyways. i really dont like ppl serving me or doing things for me.. i know a lot of ppl love it but i /hate/ it. and to do it anyways after i say 'no, i dont want you to do that' is very condescending to me.
2. when someone fights for who buys whom dinner when the bill arrives. or worse, when someone clearly wants /me/ to engage in this bs. i hate watching it, and i /always/ offer to buy dinner but if the other person says no, then that's it. i'm not arguing.
they seem stupid, and maybe they tick me off cuz they are small things and instead of telling ppl they are rubbing me the wrong way, i keep quiet about them. all the same i can't stand it when someone does either of these two things...