When the environment is quiet I listen to nature sounds.When it's noisy I listen to some playlists I made and they remain open for remixing,I don't have a standard audition,it depends of the mood I'm in.
I imagine I'm in the minority, but I listen to the new wave of mumble rap. The beats on these songs are often very good and I don't mind if the song lyrics don't always have a deep message. These songs get me pumped up and help me focus on playing my best game!
I think, if you play seriously, like a pro (trying to), you need some music for concentration. Otherwise you are waisting your time and losing your money. Check this one (works for me (experienced freeroller)):
It all depends on my mood when I start playing, sometimes I listen to quiet music sometimes I do not listen to music at all and sometimes I listen to my favorite tracks, but I do not really like listening to music during the game!
Actually i'm a melomaniac type, but for the background music, while i'm grinding i'm trying to choose more soft and chilly music, instead of power energic one. Ambient, Chillout music fits the best.