The most interesting use for Nox Arcana I've found is as inspiration for my own recent forays into music creation. I've got no finished works as of yet (having only re-acquired the musician bug recently) but what little I have is up on Soundcloud under my band pseudonym BLÖÖDKVLT (a name that just kind of jumped into my head a few months ago when I was thinking up a band name for my Rock Band 3 profile).
http://soundcloud.com/bloodkvlt

Nox Arcana's music is also an incredible scene-setter and background ambience provider for tabletop or even chatroom based roleplaying, and I listen to them frequently in the car, and also when I'm working on some of my settings for roleplay and fiction.