I was just watching Billy on youtube, and I was keying in on his emotion as he did his solo, and that is what it takes, that is 90% of it, that feel that emotion, Billy and that kit have become one, and he is in command. All the great musicians have a deep feel or deep emotion when interacting with their perspective instruments. Musicians with out emotion tends to be dry, and believe me the crowd knows it. But the more emotional you are, you tend to play with deep feel, and the crowd can feel you, and your emotion touches theirs, and moves them. Just my thoughts.
BC's