I read years ago a quote from an interview with Kurt Vonnegut that I liked a lot but haven't been able to find since. He says that he's different from most writers because all the writers he'd ever known were always the driver in the car of their lives; Vonnegut, he says, always felt that he was a passenger with some unknown someone driving the car, while he just watched the things in his life come at him. I've always loved the quote, but I guess it was a very famous quote of his because it's been damned impossible to hunt down.
“I'm simply interested in what is going to happen next. I don't think I can control my life or my writing. Every other writer I know feels he is steering himself, and I don't have that feeling. I don't have that sort of control. I'm simply becoming. I'm startled that I became a writer.” ― Kurt Vonnegut