From the interview I mentioned here are the closing thoughts of Mike.
HAUSE: What do you fear the most?
MENTZER: That anabolic steroids may have somehow altered my personality. Many people fear that taking steroids will adversely affect them physically. I’m more concerned about the way they might have affected me psychologically or my personality. Scares me to death!
HAUSE: If you could start life over again, what would you change?
MENTZER: At this point, I’m not sure that I would change anything. I haven’t lived long enough to regret anything. It is my most fervent wish, however, that I will be able to say the same thing at the conclusion of my life!