well, i played several different characters at the haunted house at work. but on halloween day, i suspect i'll be someone with a job, like on most days. and then if i'm lucky, i'll get to go home in time to be an angry guy with internet access for a while and pick on some people on hipforums.
I don't know if I'm going to wear a costume or not but my band is booked for a show that night and the different bands playing have basically been assigned musical costumes. My band has to be the Grateful Dead that night.