Of all the heads of all the sports governing bodies worldwide, UFC commissioner Dana White is probably the most entertaining. White is honest and colourful and doesn't have the usual politicians aura that most commissioners or presidents project. He is also likely the strongest out of all of them. After people doubted his claim that he could do 15 chin-ups, White set out to prove himself.
Granted he came up short, but you wouldn't see Sepp Blatter or Roger Goodell taking on that challenge.