so what do you do when listening?

Well, uselessly post on Audiogon.

Fall asleep.

Pretty much all of the above.

All kinds of stuff. Listen intently in awe, drink and party, play with the dog, work, doze, read hifi magazines, recall past musical endeavors, look for something else to play, whatever-any or all of the above. Plus double Advents in the garage-clean bikes or change tires, rub the car, do projects. I almost despise the saying but it's all good.

I listen. That's all.

I will play music while doing other things and tune in periodically, but if I am doing something else, like reading, then I may be hearing the music at the same time but I would not say I was listening because my attention is elsewhere.