If there's one thing that drives me absolutely batshit (this particular phrase "if there's one thing" always struck me as a bit odd, but that's a story for another day), it's people telling me how I feel. Like, when the phone rings, you answer it, and the first thing out of the mouth of the person on the other end is some estimation of how pissed off you are, or how tired you are. I am neither pissed off nor tired; but I am tired of people doing this, and it will piss me off if they keep it up.