what is good sound ?

When you have an "EarGasm" of course!

Mr. T, I think you've described two types of listening: hypercritical evaluative listening, and relaxed heart-&-soul listening.

In my opinion, we properly engage in the former to identify equipment that will allow us to later engage uninterruped in the latter (uninterrupted, that is, by illusion-destroying colorations and distortions).

I can get lost in a great song a cheap clock radio, if the message in the music strikes the right chord in me. But that's of no use in evaluating the sound quality of the clock radio.

I tend to give no credibility to a gushing review describing the emotion the reviewer heard in his favorite music over a particular piece of equipment. More likely to impress me would be the newfound emotional connection a reviewer feels in music that he normally dislikes. Still, that might well have more to do with the reviewer's mood than with the equipment.

Perhaps the ideal will be measurements that correlate very closely to our perceptions. That would at least be objective - free from prejudice, mood, music content, alchohol content, peer pressure, whatever. At this time I don't know of any reviewer who presents a suite of measurements that give enough information to consistently predict whether speaker A will sound better than speaker B.

In my opinion the goal of "good sound" is to recreate the same perception that the listener would have experienced at a live performance of that music. Yes emotion is a core part of what we experience at a live performance (I still smile when I think of the sheer joy of the last Rush concert I went to), but I suggest not reviewing based on emotion as that's too subjective and variable (my most trustworthy-eared audiophile friend hates Rush).

"Good" sound is completely relative to your reference frame of your most accurate/hightest fidelity stereo listening experience.. this will change as soon as you hear something "better" (which should possess a higher fidelity to the recorded source than previous frame of reference)
I remember when I thought "Good Sound" was a Dual turntable with Ortofon cartridge, a Marantz receiver, and a pair of JBL L-100's. That frame of reference has of course changed many many times.
The Key, I believe, is to have experience hearing and remembering what real musical instruments played together in an unamplified listening space sound like... anything from a symphony hall to a church organ recital, solo classical guitar, live jazz at preservation hall, blues guitar player on the street, etc... match these experiences to what you hear coming out of the speakers.

If a bear farts in the woods, is the pope really catholic, or did someone actually hear the sound of one hand clapping when the tree fell down? Snatch the pebbles from my hand and you will have a handfull of pebbles. I think, therefore I wish I were someone else who doesn't! Will someone please tell the voices to stop tormenting me!! Did the omlette come first, or was it the McNuggets? In a galaxy far, far away, in a land that time forgot, Yogi also said, "What're we gonna do BooBoo?" therefore I would not trust any accounts of the wiley brown thief of picky-nick baskets. I stand behind this statement and shall remain resolute in bringing the scoundrels to justice. Please, pay no attention to the man behind the curtain, he's merely a pawn on the checkerboard. That's really all I have to say on this subject. What more can one say? I suppose you could mention something about Jesus, or the stock market, or point to modern trends in dental irrigation to prove the point beyond the shadow of a doubt, but I have no doubt that you must all be aware by now that my methodology is beyond reproach, and yes, the sound was a good one, to be sure. It came from over there.

Good on'ya for bringing that up! Glad that's finally cleared up now. Move along now folks, there's nothing to see here...

Marco

I 2nd the first answer!
Warren I'm truly impressed that you are a polyglot and dig such masterpieces. I know you love music too. I totally agree it's a question that has no real answer sort of like trying to describe a color.