If you never re-invent the wheel does it go flat?

It is an interesting notion that you teach the way you were taught. Not the way you are taught to teach, but emulating your teachers in high school. Why is that our comfort level? Why do we fall back on that? It is hard to comprehend that the teacher's we loved may not have been good educator, or their style is not conducive to today's classrooms. How can we make that paradigm shift within a current or future teacher?