I very much judge a system by how well you get a sense of the performer as a three-dimensional person, as well as how realistically the actual recording is conveyed. Whether it's Horowitz in Carnegie Hall, Coleman Hawkins standing at a ribbon mic in 1958 or Charles Munch coaxing a response from the Boston Symphony, I'm certainly more interested in hearing the character of the performers and the sense of their physical presense. What's the point otherwise? I mean, what's a stereo for if not to take you to places and hear people you otherwise never could?
And I welcome any reviewer of musical reproduction equipment who takes the same POV. If a reviewer says something like, "With speaker X you get a clear sense of Horowitz's nervousness after ten years away from the concert platform," I'm interested! ;-)