My pet peeves with clothes:
-Tank tops as shirts. Ew.
-Leggings as pants.
-Really short skirts.
-Brown or gray on me.
-High heels on me. I would get major foot cramps and possibly start bleeding due to my awkward foot structure.
-Turtleneck anything (on me especially).
-Baggy anything.
-Boots in hot weather. ESPECIALLY WITH LEGGINGS IN GENERAL.
-Anything that restrains any movement on me.
-Anything sheer without anything else under it.
-Logo shirts.
-Yoga pants in public.
-Pants that have holes already in them (i.e. torn jeans).
-Flip flops.
-THONGS.
I have more, but those are the ones I can think of right off.