There are two kinds of people in this world:
The kinds of people who listen to the commentary tracks on DVDs, and the kinds who don't. Which are you?
I love to listen to the commentary. I almost prefer it to the actual dialogue. That probably has something to do with the fact that I love to think about how things work. I remember that after each Star Wars film, they would release a little "The Making of The Empire Strikes Back" or some such, which was really a little PR deal for the film, but I was always fascinated by these extra bits. I loved watching them make and then blow up the little models, I loved watching the guy walk around the set in the giant snowman suit with sneakers, etc.
When I listen to music, I almost can't hear a coherent piece. I have to break it down to individual instruments--there is the bass, and that's a horn part. Then I think about how I would play it, or how I would assemble the pieces, and I regard film in the same way.
So I love hearing all the little inside bits of information about why the director or writer or actor chose to do this, or decided not to do that. Or why there is a big "Blue Sun" emblem on that shipping crate in that scene of "Firefly."
Mrs. B, on the other hand, will not stand for it and makes me turn it off. So I guess opposites really do attract.