I'm going to go as the "Reaper".
Been wanting to do this for a few years now. I just need to procure some drywall stilts to make me about 2 feet taller. Gonna have the woman make me an extra long hooded robe. Then the real kicker is I'm going to get one of those mechanical skeleton arms from Wal-mart, drill a small hole in the index finger tip, and run a tube from there to my mouth. I saw this done at a bar a few years back. The guy would order a beer, and drink it with his finger. It looked cool as hell. Not to mention, an 8-foot tall grim reaper is somewhat intimidating.