I hate hearing people cough, sneeze, clear their throats. It irks me so bad and even though I know they can't help it, I so want to punch them in the throat everytime they do it. It has annoyed me as long as I can remember. I'm not a germophobe but it's just bugs me to death. that's all.
ETA: I'm pretty sure I have Misophonia. A name to the problem. Now if I could just fix it.