I think it comes from really liking literary forms. Poetry is very beautiful, but the space on the page can be as affecting as where the text is. Like when Miles Davis doesn't play, it has a poignancy to it.
I don't think of Storefront Hitchcock or Stop Making Sense as documentaries, I think of them more as performance films.
All the intelligence and talent in the world can't make a singer. The voice is a wild thing. It can't be bred in captivity. It is a sport, like the silver fox. It happens.