I remember reading this article a while back
http://lostgarden.com/2005/09/nintendos-genre-innovation-strategy.html, and it really illustrated nicely the problems I was feeling with what he calls "genre addiction".
See, I like making games like, for example, shooters. But I really do find it very unpleasant to think about the demands of the hardcore shooter audience. I don't really want to make games for people that are hardcore into any genre. I find them a bit icky and scary. I'd rather make games that are jolly and hark back to the time when people would give just about anything a go and developers weren't saddled with all this genre baggage.
I like working within certain genres. But hardcore genre fans creep me out a bit.