It's been said many times that all writers write differently, and I always thought people don't pay enough attention to that, but I had no idea how right it was until I began to revise the novel I finished last year
(Not my 2012 NaNoWriMo novel, by the way, which isn't finished, even though I did reach the word count)
A lot of authors say they overwrite. I tend to underwrite, only just touching on descriptions and having lots of sparse, vague dialogue. Not to mention that it's been several years since I started writing the version I'm revising, and both the characters and the story has grown in depth. Still, I didn't think that what had been only a 3,000 word trip would suddenly become a 10,000 word trip when I re-wrote it! And you know how some writers talk about how when they write, it seems like it's their characters, not them, who make the decisions? I have tried and tried,  but have really been unable to get to that place in first drafts. I was frustrated that what worked so well with other writers wasn't working for me, But suddenly, as I re-write my story, my characters start acting in ways I didn't plan them to! It's exactly what I always wanted to happen, except it's in the second draft! And all those ideas about the plot that I've been needing must have been taking a five-year vacation, because all of a sudden ones I didn't know existed come to me and announce that they want to be in my book.
Now I'm learning all sorts of things about my characters I never knew before, and it's so much fun!
Of course, it's far rougher than I would have liked, and I still am not sure about what's going to happen next, but I'm glad that this is all working out so well. I love revision! It's everything writing should be, except after the writing is "finished"