The music on my iPhone is set to shuffle all. With shuffle, one has no idea what is coming next! The only detail from the list of four thousand songs is a lack of a single pop song, unless you consider the songs from retrospective albums from the 60s as pop.
As I listen, especially when riding a motorcycle, I find that my riding changes with the music and artist. As I shared the observation with a friend, our conversation got into various genres and within the genres, specific artists and the songs they were playing and or singing.