Just barely behind Star Wars as my favorite sci-fi show/movie is Joss Whedon's Firefly and the subsequent "revival" movie Serenity.
I really can't say enough about this phenomenal series. I know I'm not alone in my feelings of being a Browncoat that would love to give the folks at Fox the finger. They should be bound and tossed to Reavers.
I have been Mal for Halloween at least twice, which is easy since I usually dress like that anyway (minus suspenders). I love translating random phrases in to Chinese. Hell, I even have a few pages of fan fic notes and ideas.
For all you other Firefly junkies out there that just can't get enough of the 'verse, check this out:
It hasn't been updated in a while, but it's a great source of untold tales. My favorite is "The Black" by Bill Mudron because I've been a fan of his art for over 10 years now.
They also have a great script for "Browncoat".
On the Firefly wiki you can find the script for an episode titled Dead or Alive that was scrapped. I would love to try my hand at doodling panels for both this and "Browncoat", but I'd rather just sit back and watch the episode in my head.
In the meantime I settle for watching as many Firefly/Serenity related youtube videos as I can find.
Maybe later I'll post some of my fan fic ideas...