I'm brand new on this site, so I guess this will function as something of an introduction, too.
I've been writing for fun since elementary school -- I'll be 31 in a few days -- and writing fanfic since Thundercats and He-man! *LOL* My tastes have somewhat improved, or at least grown more adult, since then.
"Recent" fandoms that I've written in include Disney's Gargoyles, X-files, one rather in-jokey Star Trek fic that keeps cropping up in various places, Buffyverse, Misty Lackey's Valdemar (for an authorized fanzine -- which promptly folded before printing my stories), CBS' Beauty and the Beast -- the 80's series -- and probably some that I'm forgetting and some that I'm deliberately not owning up to!
(Also quite a bit of original fic.)
And I read pretty much everything ... Lois and Clark was a "new find" because I missed the series when it was originally airing, and I've been amazed by the quality of the fic in the archives. There are some very good writers in this fandom ... I've been spending waaay to much time with my nose to the monitor over the last few weeks.
(editing this now that my day's done at work, since nobody's posted after me!)
Fanfiction I read currently include Buffy, Hercules, Harry Potter, and a few others. It would not be possible to list all the fandoms I've gotten briefly wrapped up in, in the past. I've been known to get interested in a TV show because a favorite fanwriter of mine started writing in that universe.
*shrug* I figure there's too much good stuff out there to restrict myself to one universe. FINDING the "good stuff" can be somewhat hard ... I am consistently impressed by the quality and quantity of fanfic available for Lois and Clark. Finding "good stuff" for this fandom's a whole heck of a lot easier than it is for, say, the Buffyverse!