One of my favorite (yet probably the most grueling) part of writing is being in the middle of the draft, with an outline in hand while still making changes as I go along. It's a balancing act--how long do I make this chapter, what is really this character's motivation, should I put more or less description here, etc.
I probably take longer than most writers to finish a draft because I'm never sure how a scene will go until I write it. Sometimes it takes me in new and interesting directions, other times I hit a dead end. So some days I delete more than I write, even as I go along, because I've changed my mind on how a chapter should go.
So far things are going well with Saturnine--and hopefully they stay that way. I'm done with the first part, which leaves three more to go. Writing a thriller is a new experience for me, but I love writing fiction that's at a fast pace. Hopefully someday people can enjoy reading it as much as I love writing it.