Same. I'll sometimes spend months mulling a story over in my head, working out the fine points, before I type a single word of it. This -- I freely admit without a drop of shame -- is because I'm a lazy writer. I don't want to have to sit down at my desk and write any more than I absolutely have to. And while this approach has left me far from prolific, I also don't tend to have to rewrite as much. Even so, I've had some scripts that have dragged on for seven, eight, nine rewrites. Typically those are the ones I end up giving up on. If you haven't nailed a script down after nine rewrites, you never will.