I work at an amusement park part-time, and we're allowed to wear costumes every day in October. I will be working six days in October, but I only have three costume ideas:
1. Clown. I have a clown suit. All I need is a new wig and some good makeup. I might do this one twice, just because I love clowns and they scare the livin' bejesus out of people and it's funny.
2. Pilot. The Flying Coaster (http://www.coastergallery.com/2000/E42.html) is my favorite ride to operate, and I have a pilot costume themed to that ride.
3. Tanooki. I'm going to make a Tanooki suit like the one in Super Mario Bros 3.
I'm still looking for some more ideas, though, for costumes that can be worn in the freeze-your-ass-off cold (last Halloween it was 20 degrees in Denver).