I do tech support on relatively simple electro-mechanical vending machines. Problem is that you have to talk to people that can't figure out relatively simple electro-mechanical vending machines. But that doesn't bother me too much, i can be patient when working with the mentally challanged. What gets me is when people don't listen, you called me for help listen to what i have to say and we can both get on with our day. It doesn't bother me when people correct my spelling, it is often off the mark. But don't pretend for a moment that because you bother with spelling correctly that you are somehow better than me. Otherwise i am mostly tolerant and patient.
Oh also people that are rude to waiters go straight to hell. I know i don't believe in God or Hell, but there is a hell for people that are rude to waiters. And i am satan there.