I'll be the obligatory wise-cracking over-sexed scene-stealing gay character who serves absolutely no purpose at all in furthering the story line, but every one loves his comic relief and undeniable good looks. If its a slasher flick I'm sure I'll be one of the first to go.
I would be the beautiful, but unwitting heroine who gets seduced by the professor/drug dealer and becomes addicted to cocaine. But then Randy comes along and saves me and I am therefore, forever in his debt, and have to make him sammitches for the rest of my life.