In mastering your instrument, you must spend many hours of hard practice, spend some amount of time with a great teacher, listen to as many great artists on all instruments and types of music, and develop a concept of technique. This involves finding out what works for you and your music. No one can actually teach you this, but guidance helps. Dizzy's comments on style confirm my own thoughts. if it could be taught, we would have many great individual stylists which, in this day and age, we do not, Perhaps, modern communications has something to do with it, or the teaching methods are too uniform. Or, perhaps, players should become more tuned into their own inner voice which would direct them towards a style of their own.
Taste is a very personal matter.
Dizzy talks about it in terms of elimination and mood. I would extend it to immediately knowing that what you are hearing is on a high musical and artistic level as well as realizing it's other attributes and, most essentially, whether you like it or not. After that it's in everyone else's hands or ears, as the case may be. Communication is so very vital to any art form and not just for the reason of making a living. It comes back to a tree crashing in a forest.