Guy:
1) If "I" like a story I wrote, then it's a success. By that measure the few historical fiction stories I have posted here are each a blinding success regardless of their statistics, simply because they are my personal favorites.
Guy has a valid point here. For any of us who are "self publishing" if we don't appreciate our own stories, then why bother?
The prolific English writer W. Somerset Maugham once said that the reason he wrote was to purge the demons in his head. That once these demons/characters were committed to paper, he was then free of them ... never to be bother by them again.
That seems like a pretty dark way of thinking about writing, but then again Maugham wrote for a living and he wrote one ton of stories, plays, novels etc.
My sense is most of us don't feel that pressure to write, but do so because the stories we write fill a void for us.
That "void" is an imaginary world in which we wished we lived.
Back to Guy's point, I would never write a story (i.e. create an imaginary world) that I can't imagine myself in. This creative process forces me out of my rather mundane real world similar to the escape one gets by watching a movie only far, far more powerful. More powerful, because it's the world we envisioned NOT someone else's vision.
Achieving that escape is what makes a story successful for me and that can only happen if I create a story/imaginary world that "I" like.