Confession: I am a very light sleeper, and it is very annoying.
At our old house, the only thing that would keep me awake were the upstairs neighbors clomping around. At our new place, there have been very odd sounds.
Granted, it is an old house, so it creaks and snaps even when no one is there. The other night as I was trying to fall asleep there were suddenly geese outside our window. The kind of geese that fly over in fall and spring. It was the strangest thing. It had to be geese, but it could have been someone's car with a weird engine problem. Then, this morning very very early the garbage truck came and idled outside our window for about 30 minutes. I think they were testing their brakes because it sounded like, "brubblbublbullbubbblbublbbbbbubbbbubbbbb stsssssst! Brublblelbbbblelblllublbbbbbbbbb Sssssttttsssssss clank brubbbllellbbbbubbbrubbblbbbb."
Then yesterday there was a firetruck and an ambulance right in front of our house. Of course, it was late evening, but I'll still consider it as a night sound. And then there's always Dave's sleep talking, stealing my covers and laughing, and shaking me awake (yes, still in his sleep).