I think, sometimes people don't review, it's because they haven't finished the whole story. Or they can't make up their minds about it. Have you ever read a story, and you just didn't feel anything? Like, you don't hate it, but you're not ecstatic over finding it. (I know I go crazy when I've read a really good fic, in fact, I gush to anyone who's willing to listen to me gush) It's hard to write a review when you just feel like giving a shrug, and go on to find another fic. Besides, I also think that most people who started off in the SM world, were originally Usa/Mamo fans. It takes a while to get used to the whole gen/sen thing cause you don't see as much of it as all the other pairings. But once you accept it, you're hooked, I know I am! Um... that's just one big ramble.
C-ya!
Wyse