Yahoo! offers a fun tool to discover your “social mojo” (partly as a promotion of its new homepage). It categorizes and profiles Twitter users, by analyzing Tweets.
Supply your Twitter name/account:

And, viola, you’re assigned a place in their categorization scheme:

Strangely I was initially categorized as a “concierge” and then a few minutes later as a “matchmaker.” The interesting thing here, however, is not the specific category that turns up but the game-like presentation and interface.