I guess you do have to think about the audience at least a little, but personally, I've always done far better writing (not my judgment) when I stop giving a s**t about what other people think. Stephen King has always said that he writes what he likes to read, and what he likes to read happens to be what a hell of a lot of other people also like to read, so he ended up making squillions of dollars by just writing honestly. You can fake it and write in a genre that you hate but usually pays the bills, but it won't be honest, and readers pick up on that.
vetivert wrote:
audience IS important. writing for yourself is fine, but it can be very uninteresting for others - i'm thinking of all that very personal poetry written from profound feelings, which come over as melodramatic angst, when read by others.
Any writer worth his salt only likes writing horror ;D