ugly
I find it almost impossible to find a response when someone asks me what I find pretty, or what I don't. I saw a question just today that wanted people to list the most ugly things in the room they currently occupied. I realised I had no answer for that. Others might choose the shaggy, brown carpet; the plaid, glass vase; maybe even me, who knows? I'll admit, I do have an off-kilter sense (by comparison to others) of what is attractive, which is not at all helped by the fact that I like tacky and kitschy items. There are limits, but you'd be hard-put to find them.