Re: When do you teach your personal style?
Pithy answer: When your teacher is not in the hall way.
Shodan is beginning level and really still in the Shu part of Shu Ha Ri (keeping the mould, breaking the mould, making it your own). That said our own personal emphasis and way of doing things starts from the day we step on the mat and conversely no matter how far we advance there should always be a connection to our senior teachers.
My best advise it to teach what interests you but don't try to consciously break from what you have been taught.