Nice post, Tima. Al M. and I have discussed this issue a lot lately. We often agree about the general sonic attributes of each other's system, and for instance, how the sound changes in my system when I adjust arm height, or compare different phono stages. We also agree that instruments and voices have no "absolute" sound, but vary depending on many factors like the space in which we hear them, the playing methods, the makes of the instruments, our seating location, etc.
However, in his system recently, we disagreed about how realistic Miles Davis' muted trumpet sounded. I thought it was piercing, but shrill, even distorted in the high frequencies and I found it somewhat annoying to the point of fatigue. He thought that trumpets can sound like that live and had no problem with it. Is this about hearing, listening, defining terms, or preferences?
We also noticed a couple of strange spatial anomalies. A few months ago, we disagreed about the location in the soundstage where the violin was placed in a good recording of a string trio. And then just the other night, we adomently disagreed about the location of two voices, one male, one female, while listening to a recording of a unaccompanied vocal duet. I thought the male voice on the left was too high at 7-8 feet and further back while the female voice on the right was too low at about 4 feet high and it had an up front perspective. Al thought both were about the same height and depth on the stage and I think felt all was normal. We played this recording a few times, switched seats, and ended the listening session utterly confused because we simply could not agree on the spatial representations of the two singers. What was that about?