Zaphod Beeblebrox from HitchHiker's Guide to the Galaxy!
I decided to do the movie version of Zaphod because I thought he looked much more "expensive" than the TV show version, although I was sad that this wouldn't involve a second head. I was going to do the third arm, but the good costume store in my town went out of business and the temporary Halloween one ran out of arms. =/ Next year I'll learn how to cast my hand in resin!
The trenchcoat was a costume piece I already had. I pinned and taped everything, trying to minimize the amount of permanent holes since I wanted to use it for other costumes. The boots I wore (not pictured, this was a photo shoot yesterday as I didn't get any good pics on Halloween) were some short black numbers I normally wear to the Medieval Faire. I had to buy some black slacks at Goodwill since I didn't own any! The gold belt was also bought at Goodwill a while ago and previously had life in a music pirate costume (Napster logo included) and a gypsy costume (from Borat).
I made almost all of the accessories (epaulet, belt buckle, fake buttons, and medallion on the epaulet) from a sheet of craft foam, gold wrapping paper, black ribbon, and in the spirit of Craftster, lots of glue. The gold "shirt cuffs" are actually fake, just pinned to the sleeves. I live in Florida and it was 80 degrees on Halloween... I wasn't going to wear any more layers than I had to, so a real gold shirt was right out! The cape was my first attempt at machine sewing since I was 10. It goes all the way to the floor. I almost bought the goatee and moustache, but I couldn't find exactly what I wanted, so I made it with eyebrow pencil and eyeliner.
One more thing: This "chain mail" bracelet I made out of a pot scrubber after not being able to find anything similar at thrift stores, even in a different color. It fell apart when I tried to take it off after the actual night, so it wouldn't stay on my hand for the shots, but here it is as simulated jewelry.
The whole costume cost about $15 including the pants, which I can wear again. I consider it a success for a college student's money and time budget.