Here's my costume from last year. I was Harvey Dent/Two-Face. Made from scratch, which included buying a cheap suit jacket and taking a lighter and spray paint to one side. I went to a night club Halloween night and won $250 and first place in the costume contest. There were quite a few pissed off girls in skimpy "costumes" that night.
This year I might go with another face mutilation costume and go as a Terminator, if I can find a cheap pair of red contact lenses.