What is the most annoying noise to you? The one that makes you cringe every time you hear it. For me, it's the sound of paper being continuously shredded. I just had to shred maybe 100 sheets, and was cringing away from the thing the entire time. Another that gets me is people filing their nails, even the feel of a nail file gives me goosebumps. I actually don't mind the usual such as nails down a blackboard.