Mine's a bit weird. I have an aversion to a large percentage of manmade, woven fabrics. I have yet to meet anyone with the same condition, but from what I've been able to glean, it fits the description of a mild form of "Sensory Processing Disorder". The same sort of thing as when nails are dragged across a chalkboard, the noise made by rubbing styrofoam, or the squeak of cotton balls. For me, it's polyester, rayon, and the feeling of a dry, microfibre towel that "sticks" to dry skin - among others (like bug netting - blech). I get terrible goosebumps and need to dig my fingers into something to make the feeling go away. I can sort of tell by looking at a fabric if it will have the effect, but it makes buying clothing/gear online a bit of a pig in a poke.
This first manifested when I was about 4 years old. As I was a child of the 70's, polyester was everywhere. My mom was dressing me and I complained that my pants were scratchy and that I didn't want to wear them. I put up quite a fuss, apparently.
Nobody calls me by the name - it's my own invention.