good listening/bad listening

It mostly has to do with the way you feel. If you are into subjective audio, you should accept your own subjectvity and stop blaming the grid!

I do also. However, in my case, I believe it has to do with my mood at any given time. By mood, I actually mean the number of cocktails consumed.

I do, too.

However, I do most of my listening at night when the power quality should be better than the day & I still "say, ehh why does it sound like that...I don't remember it soundin like that?"

I think it has to do with stress or how I'm feeling physically as I've noticed that when the same tracks are played later the same night, they sound better.

With that said, "varying power quality" is a factor, also. Another factor may be equipment warm-up time.

Other factors, less well understood, may also be involved.

To mr Bad Listening is when you are drinking with friends, boy that can get expensive if you are not cautious!
I have those good days and bad days, we just had a get-together with members in our little "Ears and Beers" club and wow the system made me proud!

Do you ever listen to your system and say WOW that is great? It really sounds excellent.

Yes, every time I switch it on. Weird I know but it is still amazes me even after many years.

Then, other days you say, ehh why does it sound like that...I don't remember it soundin like that?

No - my system is constant - it does not change in response. The only time I don't enjoy listening is when I have a cold and my ears/sinuses are blocked. If your system does not enthrall you every time then you there is something not quite right. Music played well at realistic levels is always extremely impressive.