I would have to say that the best costume would have to be Micheal Myers because he is basically the best scary movie character ever, so I would go with that costume.
Okay for all of you girls you can be a dead cheerleader or a fairy or if you are into that grown up material you can be a bummble bee or something cute like that and boys you can be a football player...
Dressing up as a hobo is easy without a costume. Just wear old clothes (jeans with holes in them, old shirt, old tennis shoes, etc) and tie a large handkerchief to a stick and stuff it with something...
Why not historical based characters- Joan of Arc ( once a Knight is enough!)- very popular in twenties and thirties, you could try different crests and insignias to make other ( Girl Knights)- a blue...
Check out the cast of characteres on Mario Kart: Mario, Luigi, Princess Peach, Toad, Yoshi, etcScooby Doo cast-pick from Freddy, Thelma, Shaggy, Daphne, ScoobyIncrediblesSee no evil, Hear no evil, do...