Not if you are human. I think your response is very normal. There are factors which make for sonic differences in your playback but IMO your mood/response to music will be different on different days. This is true of reproduced music as well as live performances.
Does your system always sound good?
I've seen incredible rigs in the Virtual Systems section. I am curious to know if your system always impresses you. Sometimes I am blown away by the sound and the next day it just seems ok. Is this normal? I am trying to enjoy the music, but catch myself analyzing the sound. It could be that my speakers are still breaking in and it sounds different from day to day. At some point I think there must be some sort of acceptance factor that comes into play. Am I wrong? Can you actually put together a system that totally satisfies you all of the time?