If you guys want some inspiration, here's a list of categories that another Mafia forum has for their "scummie awards".

Player Awards:
# Best Role Claim
# Funniest Role Claim
# Best Performance by a Team
# Best Performance by an Individual (Pro-Town)
# Best Performance by an Individual (Scum)
# Best SK
# Best New Player
# Best Mafia Catcher
# Most Cunning Manipulation
# Most Improved Player

Game Awards:
# Best Role (new or adaptation)
# Most Enjoyable Game
# Best Flavor Text
# Best Setup
# Best Performance in a Losing Cause/Cassandra Award??

Non-Game Awards:
# Funniest Player
# Best Contribution to Mafia Discusion