Best: Tractor engine idling. It's a nice consistent low rumble that you can feel in the ground even when it's not that loud. Like being rocked to sleep.
Worst: Somebody building a deck or house nearby. Just when you think the random hammers and nail-guns might be over the racket starts up again. Impossible to sleep through.
Well, that's no ordinary rabbit! That's the most foul, cruel, and bad-tempered rodent you ever set eyes on!
I almost felt sorry for that poor cyclops.