In the "what was I thinking" department, I present a stunning modernish Afshar, whose Day-Glo colors and coarse weave were so offensive, my dog wouldn't even pee on it.
Then there was the 1970ish Kurd with truly disgusting cow-byre colors of rust, steel gray, and not-found-in-nature green...
In my own defense, I have to say that I bought both of these on the strength of a couple of very fuzzy digital photos. It's amazing how bad photos can make truly noxious rugs look only half-bad.