Yes, absolutely you can have too much music. At a recent one-day music festival I attended, there were twenty minutes between each band. These twenty minutes were filled by music from the D.J. booth being put through the sound system for the main stage. The end result was ten hours of music, non-stop - it was too much. Sometimes you need a little respite, or it starts to feel like assault and battery on your ears.
Also, I buy too many C.D.s - or, to put it more accurately, I buy them at too high a rate. I barely give myself a chance to listen to what I already have, to properly absorb it, before I'm off on the next spending spree. Occasionally I delve back into the "archives" of my C.D. collection and find an absolute jewel that I'd somehow forgotten about in my mad rush to have more, more, MORE!
Music is wonderful and I couldn't imagine life without it, but as with any good thing you can have too much of it.