Posh kids (up to about 28, you know the ones) being supercilious or pseud-y or astonished at normal mild hardships.
Eton-trained politicians, speaking.
Our cat whining for food while you're having a snooze. She's got the perfect two-month-old-baby-screaming-in-agony note, it's awful.
50Hz mains buzz on a stereo.
That one squeaky floorboard under the newly-laid carpet so you can't just screw it down.
"Muuumm...."
When you've tried to start the car six times and the starter motor noise is getting slower.
Chainsaws when you're out on a walk (Texan or otherwise!).
Something that goes beep occasionally, but only does one "beep" then goes silent for minutes/hours, making it impossible for you to track down what the fuck it is.
Fans that go from fine to rattly to fine again. Or ramp up and down for no apparent reason (mostly laptops, that one).
People tapping, table or floor, at work.