Go as the red Indian, you owe it to yourself. But only do it if everyone is in agreement with the whole Y.M.C.A theme. I wouldn't want you to turn up in Yorkshire as the only red Indian in the Village :-)
I fancy myself as a cowboy, but I feel strangely drawn toward the leather biker. He has a tache so big you could hide your bike in. God I'm so confused, fancy dress and sexually :-D