P is for pet peeves
One thing (and I'll keep it to one otherwise this post could be incredibly long) that really grinds my gears is when people jiggle their legs when they're sitting on a bed or sofa, so much so that the whole set moves and I find myself bouncing up and down. It's just so irritating! Keep your legs still.
On the few occasions that I've been guilty of this I have been absolutely ripped into. It's not fun. I might try and be more tolerant. Bah, no chance.