Yeah, I'm the same way. I never sit and think a long time - I prefer to think by doing, to externalize my thoughts so I can move it around, change things, see the thinking process in front of me as code and observable bahevior. Then I just keep shaping it until it becomes what I envisioned at the start. But then, where did that "vision" come from? Thinking over a long time, usually days and weeks, sometimes years.