I voted Other. Because I don't sew, my Mom makes them. Last year she (uh, my kid, not my Mom) was a hobbit: white, puffy-sleeved shirt, suede-like cropped pants, brown vest, shoulder bag.
This year we're reusing the white shirt. Mom made a jumper in some leftover brown material, and I bought some yardage on eBay that looks like drapes. I am going to cut out 7 figures and Stitch Witchery them around the base of her skirt: Maria von Trapp. She loves that musical.
I think even if she wanted to be something like a witch, I'd encourage her to assemble it from Goodwill, etc, rather than buying something prepackaged.
What were the kids last year? What about this year?