Originally posted by M.Red:

most annoying you ask - when there is no sound at all (no enemy is around)
thats make me nervous because it allways mean - something is up

This one. It's the only one that annoys me. I actually really like the rest. My favorite is the sound of a surtling dying.

BTW, for those that don't know, the deer one is directional. If you spend time hunting, the initial will be to let you know they are there (and it's a bit directional but harder to pinpoint). Go into sneak, move slowly, listen for them to make a sound again. You can use that to tell what direction they are.