I find extreme satisfaction in discovering that I still know my past characters well enough to know how they would react in a given situation, without having to spend a long time thinking about it. I find equal satisfaction over being creative enough to have characters that don't act the same way when in similar situations.
If only I could reliably create characters this in-depth for my novels as well (but then, that's only one of many, many problems with my writing). Here's hoping I prove I've fixed at least some of those problems in NaNo '10!
I currently have 3 ideas bouncing around; I'm hoping I'll have an outline for at least two of them come Nov 1st. Perhaps I'll also get something finished, or at least a bit less rambly and with a stronger plot. And I think I've got a better grasp on dialogue, if my d&d stories are anything to judge by. At this rate, I may be publishable sometime before I die!