>>11731107Mark Henry has done interviews about this. Mark grew up big and strong. His mother raised him to be aware of his size and to not kill the other kids. Mark took this to heart and always worked to control his anger, plus he said he just doesn't like being angry to begin with. And since Mark is such a genuine person, he can't really "fake" being angry.
Then Vince ribbed him and pissed him off to give him a push to do the HoP gimmick that Mark had originally resisted. The rest is history, puppets.