How much?

3 to 5 hours per day, sometimes longer.

  I am retired. I listen from one to three hours a day. With Apogee Duetta II loudspeakers, it is easy to listen.

I have specific background music needs for my morning newspaper reading (classical piano works), and that changes to serious listening here and there throughout the day and night...I turn off the tube amps when out...so my rig gets some serious time every day, which is good since my new Morrow cables still won't be broken in until late December...I'm a retired person, if really a person at all, so I can do whatever the hell I want (especially when my wife is out of town). PARTY!!!

About 45 minutes most mornings while getting ready for work, and an hour or more each night while reading before bed.

Sounds perfectly normal to me. I do have a dedicated room, and I also listen about 2 hours per week, Saturday mornings. Eyes closed, sitting still, in the sweet spot, just listening. The other posters are listening as background music. For me, my kind of listening is much more enjoyable. YMMV, just my 2c.

Tom