Oh, so many, which ones to list...?
--crinkly wrappers, including candy wrappers. On many occasions I've walked out of theatres, in the middle of a play, because I couldn't stand sitting there listening to it.
--people chewing gum; I hate the smell too, and those stupid blister packs.
--people clicking their mouse or loud typing (no longer a problem since I'm done school, but I've walked out of many-a-class)
--pretty much any artificial smell that's fruity or musky. (I don't mind chemical smells like bleach, plastic, etc) Artificial vanilla, mint, and coconut, banana and strawberry are the worst. (I do like 'sharp, clean' fruits like citrus and kiwi.)
--touching metal, especially dusty dry metal, or metal with a coarse surface.
--the smell, texture, and the very sight of opaque soap. Get it away from me! I only use glycerine soap.
--Also, most cosmetics, especially opaque ones, and I quite hate toothpaste as well.
--the smell of bouce sheets and baby powder
--watching people fiddle with things with the tips of their fingers. I feel like my own nerves are being short-curcuited or something. I can't close my eyes, because I know they're still doing it.