The latest one that keeps pulling me away is my post-Not Fade Away fic. I've had the prologue/1st chapter in my head since I finally got to watch the finale, and yesterday in our mucho driving to and from San Francisco (Craig took scenic routes to show off to his parents), more of the story fell in place, including a working title I rather like. Except when I told it to Craig, he poo-pooed it. Now, I'm all second-guessing the story, which at least helped me concentrate on some of the revision on the Frost chapter before I post it in the morning.
And I'll probably end up retitling the thing, even though I still love Vagabonds & Princes.