>> I've had three main tracks that I've used for the past 8 months or so.
I've had several dozen songs (grown from ~5 in 1998) that I've used for almost 28yrs. They were originally mp3s, eventually cds, then apple music. I'm glad the artists have been getting royalties on the songs, i play them on loop sometimes for hours a day for decades on.
The first one is a 1-hour mix of "In Motion" from the soundtrack to The Social Network: https://youtu.be/bCxPmMbZjuk
The second is a 1-hour mix of "It Has to be This Way" from the soundtrack to Metal Gear Rising Revengance: https://youtu.be/jKGDib6qZBo
The third is a 1-hour mix of "Clock Tower" from the soundtrack to Dead Cells: https://youtu.be/plwhysPCxXI