I believe discussions of this type to be very useful. We always talk about the necessity to play (practice) "musically", but what does it mean? There are precious few "concrete" instructions. If you take too many liberties, you are an amateur. If you are totally accurate, it is uninteresting. The concept of intervals and how to view them seems such a fundamental idea. I find that it helps me to connect notes and to connect bars and to create a conversation between voices and hands. These connections form a basis from which you can start the music. In striving for musicality, it is always helpful to learn how each individual approaches this subject, because it has infinite possibilities. How do we deal with infinity? Infinity means that at times, you will be criticized, but at the same time, there is this high level of musicality that is very real. Just as you tend to play better golf when playing with better golfers, musicians need to communicate (although most are poor verbal communicators) to uplift each other. That is why it is so important to listen to recordings and performances, as long as you realize that exact imitation is neither possible nor desirable. The end product must be a burning desire to run to the piano and start making music.
Topic: Intonatsiia by John Bell Young