There’s a basic undeniable truth about teaching which is inherently unscientific and that is the fact that we learn best from the people we like. Therefore it seems to me that the most important thing a teacher can do is be liked. At least for the most part.
‘Personality’ is a word we use to describe famous people and this is partly because celebrities often have a repertoire of interesting stories to tell. They can hone this persona into a fine art because they get interviewed so much that they have heard almost every question that can be asked.