Fic, or lack thereof

What is it about some shows that spawn a thousand fic writers and others that just don't? Is it the characters? The writing? The need to fill in things that the show's writers haven't bothered to address? It's hard to miss all the SG-1 and SGA fic out there, but look for NCIS or Without A Trace and there's very little. Are those shows too perfect, the characters not interesting enough or is it that scifi tends to attract writers? (though that doesn't explain Harry Potter fans).

At this point I should mention I don't read het. It just doesn't interest me as a story. So when I talk about there being very little to read, it's possible there is het fic out there that I skip over due to complete lack of interest.

It takes me a while to get to know a show enough to want to write for it, and much, much longer to get around to actually writing. I'm in the middle of an NCIS/SG-1 crossover at the moment (well, 'in the middle' meaning I've started) as well as another SG-1 story, but there is an urge to write WAT and some pure NCIS. Also maybe a bit of West Wing. And Man From Uncle because that would be oodles of fun *g*. Still, if the world was peopled with lots of mes then there would be not a great deal of fic out there at all.

So anyway, just musing, wondering, pondering.