I grew up on Bach and Beethoven, and now I'm listening to more modern composers who I can't even name. But since I'm constantly doing music, it's difficult to have that quality time to listen to music and do classical stuff.
I usually work on a film soundtrack for two years, turning in a song every few months, and that keeps my creative energy high, because I'm constantly rotating projects. The trick is to make sure I don't work too hard and get exhausted.