Being good, but not quite great, can be almost a curse.Today's column comes from a heated discussion with and about musicians. To the performer, music can be spiritually and aesthetically uplifting or it can be frustrating. This has to do with the artist's expectations versus reality. I've discovered that many good musicians mistakenly believe that had they practiced 10 hours a day they could've been great.In my early life I was a professional trumpet player before becoming an aerospace engineer. While at UCLA, I earned a degree in music theory and composition with a minor in science and engineering. I …