Hi Anna:
I think better instructors share some of these traits: confidence, competence, experience, educated, credentialed, helpful, creative, and honest. Great traits for teachers, and usually possessed by all to some degree. So we come into the classroom striving to be our best, but we bring with us much of what we already have.
Knowing that, and believing in ourselves creates great classroom dynamics and definitely facilitates better learning outcomes for the students.
Regards, Barry