My listening pattern is probably not like many others; I travel a lot on business and may not be home for 4-6 weeks at a stretch. But when I'm home I can spend 16 hours a day spinning records and probably more since I got Wi-Fi and can sit on my favourite couch while listening and working on my lap top. If, 10 years ago, it was said that this would be how I was clearing my desk, I would have laughed!
I tend to listen in themes, too. Like all Ella nights, Coleman Hawkins, Sonny Rollins,etc., which means listening to that particular artist and all the other partners they played or sang with.
I know only too well what you mean about deteriorating hearing, my wife and I used to listen and attend a lot of Opera but she now no longer enjoys it as her hearing has started to go.