I always played it as Mafia, Detectives, Citizens, and Doctor.

But yeah, I looooove playing this game at sleepovers, retreats, camping outs, etc. And plus, I'm really good at it. I can usually fool everyone except Del Murder. He's always on to me whenever I'm Mafia.

Never played it online, but I'm game!

btw, here's a little flash guide to playing Mafia. It might be helpful to people who have never played it before.