Some of my favourite costumes I saw at our Halloween party were: a robot complete with bike light eyes, sexy saxophone man, clockwork orange guy and Alfalfa. I never used to be into Halloween, but I must say it was pretty neat having a party where almost everyone was in costume. I loved being able to refer to people as what they were dressed up as, like "what's the slutty Olive Oyl drinking over there?" or "why'd you almost fight Buzz Lightyear?" or "Hunter S. Thompson can't find his phone".
I also love this:
Best thing I heard all Halloween - "Oh shit! Jesus just punched that Ghostbusters in the face!!"
Also, our party consisted of four kegs and two visits from the cops. How old am I, really?