The best teachers have their own styles that express their personalities and their passion for learning. One of the best teachers I ever had was a tough, demanding taskmaster. Another had a kindly, almost motherly style. You can't fake style. It has to come from the heart and be a natural extension of yourself.
Great teachers have passion.
Creative people from Michelangelo to Natsume Soseki to John Lennon shared a belief that they could change the world through art and threw themselves wholeheartedly into the effort. Some might call this obsession. The art of teaching, like any art, cannot be clearly defined or measured. But I am sure that many Kyooryoku readers can see themselves in this description of artistic teaching. I cannot tell anyone how to be passionate, develop a personal style, or improvise.