How much emotion is too much in public speaking?

How much emotion is too much in public speaking?  That’s the question the following video raised for me.  It’s Daniel Beaty, poet and actor, delivering the powerful story he calls, “Knock, Knock”:  http://tinyurl.com/ykul7c7.  Beaty’s emotional pitch is exactly right for his subject, but what about more conventional settings and business-oriented topics?  How much is too […]