1) Anything that looks like rags like Irina typically wears and one of Kyoko's ensembles this year is what I'd call a disaster.
2) I believe it was Vanessa G. who wore some type of silver lame (s/p?) pants thing with ropes? I don't remember it exactly, but I remember it was AWEFUL.
3) Dinev's costume this year.
4) Any costume with a headdress and/or feathers.
One that I did like - and I usually prefer understatement - is Rudy's costume that has pink and black striped pantaloons. Makes me smile whenever I see it