I do this to. Film scores: anything from Batman, Transformers, Star Wars, Narnia, LOTR, The Last Airbender (bad movie, great music, go figure) and just about anything by Hans Zimmer. Also just about anything by Immediate Music, Globus, Celtic Woman, Yanni, Enya, or Karl Jenkins. A little bit of Nightwish, and the Skyrim theme every so often.
Also, I find a bunch of songs that really stick with me and then sort them into categories to associate them with different nations, landscapes, or characters. Then i listen to those themes when writing those places or characters. Just like in a movie, a character's motif can help you remember and emphasize their traits in a way that a simple list of characteristics can't do.
This is pretty much what I'm listening aswell. However, an occasional Vivaldo/Beethoven/Mozart is not that bad either