I don't really make that much of an effort to hide my nerdom. But according to The Onion's A.V. Club, and their list of obsessions even geekier than Monty Python, I would say I come in somewhere around the middle.
I am well-acquainted with the tv-related geekdoms (no surprise), but can safely say that I have managed to avoid the nerd activities that spill into the real world. Just in case you were wondering here is how I rank on The Onion's guide to geekiness:
Battlestar Galactica (but only the new series, I have some standards)
Fantasy Sports Leagues
Wikipedia (as a resource, yes, as a hobby, no)
Rocky Horror Picture Show
Media specific role-playing
Magic: The Gathering
World of Warcraft
Live-action role playing
As you can see, one list is clearly longer than the other. For the first time, I fall towards the normal side of the geek spectrum!
And the villagers rejoiced!