Mine is certain fabrics rubbing together - generally cotton/polyester type stuff that's quite stiff, when it rubs together it makes this noise that gives me the jeebies. Cordroy rubbing together is almost it, but not quite.
Also I'm horribly afraid of falling up stairs. Falling down them is no concern, I'll happily run down flights of stairs, jumping some, but always go slow and steady up them. It's probably not that irrational though, I'm pretty sure it comes from mis-stepping once or twice when going up the concrete steps that went from ground level to the back patio at my parents' place, and being scared I was going to smash my face/nose/teeth into the concrete step.