Sarah Monette over at Storytellers Unplugged has an entry entitled (Thinking about) Thinking About Writing and here's an excerpt of what she has to say:
One of the first things I learned when I began reading books about creative writing (and even more so when I began hanging out with other writers) is that no two people understand their creativity in the same way. (This goes for other endeavors, too, not just writing; I'm sticking with what I know, but I'm not meaning to imply that writers have a corner on this particular market.) And the second thing I learned was that not all ways of thinking about creativity work for all people.
One person's muse, in other words, is another person's poison.