1. You know that material that's not quite metal, but looks a lot like it? I can't stand looking at, and especially feeling that material. Every single time I get a chill down my spine that lasts until I plug my ears or walk away. It makes this strange, spine tingling noise when you rub your finger on it, which rings in my ear for several minutes afterwards. Everyone thinks I'm crazy because they have no idea why I'm cringing, they can't even hear anything, but I do. This was especially hard going laptop shopping yesterday, because most laptops are made of this material. Of coarse the guy from best buy who was helping us pick one out had to run his fingers over every single laptop he passed. I was practically dying!
2. The sound of paper sliding against a wall. I discovered this one when my friend was doing this in my basement. "Should I put the paper over here?" She slid it to the opposite side of the wall "or over here?". I dropped my pencil and plugged my ears. She thought I was having a seizure or something, she started saying "Are you OK? What's wrong? Do you need help? What do you need?" Yet the whole time she continued sliding the paper on the wall. It drove me nuts.
3. The sound of writing with an un-sharpened pencil. I can't even explain this one. I usually just stick with mechanical.