I'm definitely more intuitive. In fact, I have to truly hold the majority of the story in my head before I ever start typing -- that includes the story arc, the mc's emotional arc, the ending -- the whole shebang. I will add twists and turns as I write, usually whenever I feel the story begin to drag...but the books that I feel are my most solid started in my head, completely together and ready to go.

For me, that also means my first drafts are quite fast -- my current WIP will be done in less than three weeks -- and my NaNo books tend to be some of my best, because of the thinking I do beforehand. Interesting topic here :)