Hmmm. I used to knit voraciously, not so much anymore. I was a trekkie, not a trekker, because I am old school, but I stop short of the fake ears. Have been known to do some wire wrapping, beading, and make a little jewelry. I collect various scents of a specific brand of Gothic perfume oil, which has some remarkable similarities to collecting V4L cartos. I play a lot of Flash computer games, but much prefer to hang out here. And I collect V4L. Hey, guys, it's time for some swag, yes?
My work has apparently become my hobby, as I have been laid off for some little while now.
EDIT: After reading Conard's response about hobby becoming a business, it reminds me how much I used to love to travel, until I took my present job. When I'm working, I'll sometimes spend 8-10 months a year living in a hotel. When I take a vacation, people ask me, "Where are you going?" I'm always going home. How boring, but the last thing I want to do on vacation is spend time in a hotel room.