Ah, that's a tough one. I have a specific playlist on Spotify called "campfire tunes". That one gets some heavy rotation. This last trip I was discovering a lot of the new "deep tracks" channels that Sirius/XM just added. There is some good stuff you don't normally get to hear on those. With that in mind, it's always a mix of classic rock, jazz, country, rap, rock, and anything else you can think of.