Anything can become a musical sound. The wind on telegraph wires is a great sound; get it into your machine and play it and it becomes interesting.
'The Graduate' must be the best use of songs ever in a movie; it adds a layer to the movie you wouldn't ever get from a score.
Here's something I probably shouldn't be saying: I never listen to my soundtrack albums because I can't stand it. It's just stereo. When I write, I write in surround. My life is in surround.
With animated film, you have to create the sonic world; there's nothing there. You get to color things in more and you're allowed to overreach yourself a little bit more, and it's great fun.