I completely agree with Bleak House Books. It's the first time I've ever heard that kind of thing. Though I can see how it would work with a tie-in franchise, I don't see how it works with everything else. If you're not writing what you want, what's the point? You're never going to please everyone anyway. Example: Marjorie B. Kellog wrote a four book series called the Dragon Quartet. Really great and original, I enjoyed two and three (one I missed, but you didn't have to necessarily read one to get what was going on in two and three. Still looking for it though). Waited in anticipation for number four, and was completely disappointed with it. It didn't flow like the others did, the ending wasn't satisfying. I'm sure there are fans out there that loved it. Whether she wrote what she wanted or listened to her fans I have no idea, but I think it's a moot point. Yes you may disappoint them if you write what you want as opposed to listening to them, but on the flipside you could listen to fans and end up disappointing them anyway. Stephenie Meyer admitted she wrote what she wanted, and look at her. She didn't write for an audience (although I still don't get the appeal of those books).