I have a variety of stuff I listen to, in various playlists on Spotify. I have some that are themed to my writing mood, usually of soundtracks from movies, games, TV, anime, etc that put me in the mood to right epic and exciting adventure and battle scenes. 
I have others that are more just general music that gets my imagination going and my mood up too. 
I usually have something on in the background though, just because it helps me with getting the juices flowing.