I'm more intrigued by things that I haven't really conceived of yet. I have the luxury of being able to think: "I've never done a ballet or an animated film myself." There are certain things that I feel I'd love to. I just want to keep trying new things and seeing if I'm any good at them, and if I'm not, then at least learning that. I definitely think I'm more interested in what medium I can explore right now than any specific story.
The first thing I ever thought of when I thought of Buffy , the movie, was the little...blonde girl who goes into a dark alley and gets killed, in every horror movie. The idea of Buffy was to subvert that idea, that image, and create someone who was a hero where she had always been a victim. That element of surprise ... genre-busting is very much at the heart of both the movie and the series.
If you try to multitask in the classic sense of doing two things at once, what you end up doing is quasi-tasking. It's like being with children. You have to give it your full attention for however much time you have, and then you have to give something else your full attention.
If something isn't working, if you have a story that you've built and it's blocked and you can't figure it out, take your favorite scene, or your very best idea or set-piece, and cut it. It's brutal, but sometimes inevitable.