Wow I just checked, assuming you are jbskeets, we really are already friends on the site. What the fuck are the odds of that?! Holy crap. And yeah, since you play Sporcle, maybe you can help me out with user challenge badges, most of my user challenges go unanswered.
EDIT: As far as categories for challenges, I do mostly Science and Geography, but I play a fair amount of TV, Movie, Literature, and Sports quizzes. Mostly MLB for sports, obviously. I will destroy you at geography. I have my time for "Countries of the World" down to about 10 minutes for all 197.