There can be a wide variety of reasons I listen to the music I have. Most of the time it comes from the mood I am in at the moment in time. Indeed, my Spotify playlists have several themes specially designed for various moods. If I am in one of my battle the universe moods - there is a list for that, and if I am in a romantic one - I have a list covering such. A lot of my music comes from Celtic Woman back when Lisa Kelly was still with them, Taylor Davis (One of my all time favorite violinist), and epic-battle inspiring music from various movies: Lord of the Rings, Star Wars, Star Trek, Gladiator, and so forth. Usually, such music also comes into play depending on what I am writing at the time. If I am trying to write a battle scene; then very likely something with such music is playing. The same is true if I am writing in a Star Wars fanfic, or a romantic story… the music sets the mood, and makes it easier for me to focus my writing energy.