Richards, Olly. Interview with Michel Thomas Publisher Sue Hart, 2017. https://www.youtube.com/watch?v=abjrsATBc5A.

Thomas had a secretive nature and did most communication either over phone or in person. He didn't write letters. Sue Hart felt that it was the result of his experience in World War II. (Potentially relationship with spycraft?)

He was a bit of a showman and enjoyed dropping names. He enjoyed his fame and status. Thomas seemed to enjoy people listening to him and didn't appreciate confrontation and dealt with it by shutting people off and walking away.

Nothing deep here about his method really. All just background.

https://www.youtube.com/watch?v=abjrsATBc5A

—Ronald Reagan