A strange phenomenon

I tend to agree with what Arh said. Systems that have that initial "wow" factor tend to wear on the listener in the long run. You may be mistaking what you hear for listener fatigue. Symptoms can be as you described, the desire to do something else besides listen to music.

Shakey

"Turn the system on and let it play for 2 hours and leave the room. How does the system sound when you return? If it sounds anemic at first listen, then it could be an equipment problem. If the system sounds great and then falls off within 2 hours, it is more than likely listening fatigue."

Good idea!

Shakey