What’s your biggest pet peeve?
The first one that popped into my mind is, People who make loud disgusting noises while they're eating. That is in no way my biggest one, nor apropos of anything happening in my life right now.
Wafts of cigarette smoke; now that's one that'll have me at my hissy worst, and one that's much more common.
Also when my cat lies on the bed to where I can't stretch my feet all the way down. She does it on purpose, yanno.