What+does+it+mean+to+be+a+good+teacher?

I recently had IEP meetings. The parents of some of my students told me that I was the best teacher there child has ever had. I wanted to ask the parents what made me better than other teachers. I didn't ask this question because it didn't seem appropriate. However, since this Wiki forum is made up of ambitious educators, I would like to pose the question to all of you. What makes a teacher great?

As a parent of a child with special needs I can say that my son's best teachers focus on what he can do rather than what he is limited by.