I think many writers write because it's a convenient way to explain themselves to themselves. We take the chaos and the turmoil and the bullshit of our lives, and we make it into something that has a harmonious shape and sound.
I started writing at the kitchen table after midnight. It took ten months to finish that first book; I sent it to a publisher and I got some kind of prize, so it was like a dream - I was surprised to find it happening.