Slow and natural voice
I remember watching a program about Micheal Caine, and he said the reason why he spoke so slowly was, because of what his dad told him. His dad said to speak slowly because if you speak fast, you give the impression that what you have to say is unimportant, and you just want to get it over and done with. Hence he speaks slowly and with purpose......makes sense to me. (I hope it didn't take long for me to say that !!)
