I don't ride with headphones for safety reasons, but mainly because nature's music is better than anything made in a studio. I do tend to have songs in my head, esp on solo rides. Beck's "Go it Alone" is a good default and the bass line sets a great tempo, but for some of those exploratory gravel adventures now and to come, I think I'll have a new (old) song in my head. A sad song, but a beautiful melody. No banjo in this live version (as was on REM's Fables of the Reconstruction recording), but beautiful all its own.