Ok, this thread has not been as interesting or funny as I expected. The essential problem is that stereo doesnt do real life. It's a 2 dimensional medium. So, you can either strive for neutrality, each component adding to or subtracting from the signal as little as possible, and listen to what the recording engineers intended. Or you can play with frequency response to try to make things three dimensional and flesh things out and sound realistic.
I read a review of a preamp a year or two ago that I thought was strange. The reviewer said it sounded different from his reference, but couldnt say which was right. Then he said it sounded different from no preamp, cdp straight into the amp, which would seem to suggest it was not neutral. The he said it sounded more like the real life performance he had just attended than either his reference or no preamp at all.
Some time ago, Carver Corporation marketed a preamp with a "sonic holography" circuit. What was that? Just an equalization from flat, or deviation from neutral, in order to sound more like real life.
A famous guy who quit hi-fi (and who I won't name) said: "Audiophiles don't give a damn about whether their systems sound like real music as long as it pleases them. It was inevitable, though, when the vast majority of music-lovers never hear live, unamplified music to compare their playback with." I think that's the answer to the original query above.
Althouh I dont really care if my system measures flat, so long as it sounds to me like the real life voices of my favorite performers (or the real life sounds of specific instruments), I think I like all of my equipment because it is neutral. I think it sounds like real life because each component is as neutral as it can be and either the recording engineers did a really good job or I seem to somehow fill in the blanks.
That's the only way we can make any progress, if every one has the same goal of neutrality. All of the high-end stuff that doesnt aim for neutrality leads us astray.