I can't stand polystyrene foam, as in styrofoam. I literally cannot be in the same room as the stuff. I hate the feel of it, I hate how it crumbles everywhere, and most of all, I hate the noise it makes when you pull it out of a box or rub it against something. I think it's probably as close to a phobia as I've come. Makes my skin go all tingly and weird just thinking about it.
Weird as shit.