Writing to music brings out a whole slew of emotions. My Itunes folders are listed according to the type of scenes I'm writing. Writing to "Don't worry be Happy" when Waleron and Delara are fighting or having an intense moment filled with their emotions just won't mesh. With the way their emotions are on a roller coaster of  electricity, it would be Paramore or maybe Leona Lewis's "Run".
Sometimes if I have a moment of uncertainty regarding a scene or sentence, I close my eyes and listen to the music to feel the emotion I want to portray in the scene. I want every word or gesture coming from my characters to be exactly what 'they' would do or say. It would be unlike Jedrik to be in a scene without giving some kind of smart ass remark. That is how he deals.
I love every genre of music (okay, almost every genre). I can have country song playing and the next song is pop or rock then Celtic. This way I'm almost always listening to fresh music as constantly there are new songs coming out to be downloaded that I can mix into my folders. The newest song I purchased is Leroy Bell's "Dream of Peace". What a remarkable voice.
I do have one song that I listen to more than any other and that's "More Time" by Needtobreathe. I never hear it on the radio which keeps it fresh and the song kicks butt.
The sex scenes, well that is another story . . . .