What do you do when you listen to music?

Drink...

90% of the time I surf the web, reading... 8% just listening, < 2% cleaning the acquarium.

Listen to at least one or two cds on most nights. Sometimes the laptop is open but it usually gets closed at some point as the music takes control. The laptop is a bad habit. Before I bought this laptop I would just listen although not as regularly.
Also, when my wife travels (a couple times a month) I will sit with the stereo for longer periods and at higher volume.

The responses to my question have been fascinating. Thanks!
It makes me wonder if having a high end system is so good, so real, that it jumps up and grabs you and holds your attention.

In the few times I have heard really great systems I had no urge to do anything else. Kind of like the way a movie holds my attention.

I suspect that if I had a high-end system it could turn me from a passive into an active listener. Being active makes the experience more satisfying.

I'm like your friend. I just sit, and listen. Sometimes to the totality of the piece, but mostly I'll pick out some individual instrument - especially bass - or voice, and follow it through the piece. It can be compltely involving.