Right now I'm just experimenting with my userboxes; please let me know if I've screwed up excessively.
So, I spend my time patrolling Wikipedia's Recent Changes. Since I don't feel enough of an expert on anything to meaningfully contribute, I've decided to do what I can for Wikipedia by hunting down and killing wiping vandals. I have a tendency to attach (what I think are) witty comments to my rollbacks, and so often get beaten to the punch. As well, I use a tactic of rollbacking that I like to call The Suspicious Bastard method. I hide logged in users and look for anonymous contributions that have added characters - somewhere between 25 and 500 is generally my range. More often than not, I'll catch somebody who tried to slip under the radar - and I don't have to worry about people sneaking in and rolling back before me.
I live in that big, snowy place called Canada and have a sense of humour. This has now gotten me into trouble once; I have a nasty feeling it will do so many more times...