Some of the sounds (in addition to those already mentioned) that do (or have) driven me nuts: fast scraping to get last bit of yogurt from plastic container with plastic spoon, chewing/cracking gum where the chewer makes little air bubbles in the gum and then pops them (x10 if they're chewing with their mouth open), whistling, humming, tapping fingernails against table top, tapping foot against floor/chair/desk, digging in purse, cell phone ringing/dinging/alerts, sighing.

I once worked with a guy whose normal breathing made a whistling sound. I was sitting about 20 feet from him and one day I was about to go insane. I immediately bought a pair of Bose QC-15 headphones and it made all the difference in the world.

Currently, there's a lady who sits on the other side of my cubicle wall who wears a charm bracelet. The sound of her charm bracelet hitting and dragging across the desktop all day drives me batty.

I suppose I must have misophonia (first heard about it in this thread). There are times when I wish I were deaf.