As someone who interviewed several film composers (I talked with John Debney, Elliot Goldenthal, Howard Shore, Alexandre Desplat, Dave Newman, Christopher Gordon and few others) I know very well that you have to be easy and relaxed when you're posing questions with such personalities. Even though you made your homework and prepared lots of interesting deep questions, you have to be careful to follow the suggestions that come out from the conversation itself. You can't just impose your own agenda over the course of the chat, otherwise the person who's being interviewed could have the impression you're trying to force words into his/her mouth. Of course it depends very much on the overall personality of who you're interviewing and how they feel in that particular day and moment, but one thing I learned from my own chats with those guys is that you don't need to make an impression you're clever and knowledgeable. They appreciate a lot if you mention a lesser-known work of course, but they appreciate even more when it's clear you're listening to what they're saying. Williams is such a huge personality with a large body of popular work that it's almost inescapable you end up talking about Star Wars, E.T, and Jaws, especially if you're committed to do a piece addressed to a general audience. The great thing about JW is that he never feels bored or annoyed when telling well-known anecdotes and stories. In this sense, he shows always a deep respect for the person who's interviewing him. This is anything but ordinary, especially when we're talking about celebrities of some sorts.