I think p4p means what it means, who has more greatness within them when compared pound for pound. Typically the heaviest fighters get this title, because they can beat smaller champs. but if all champs were equal size whos greater? bj penn has proven he is # 1 by fighting bigger champs, winning ww belt with no tune up fights vs matt hughes, when hes really a guy who could fight in the wec at 145. He went the distance with machida and almost beat gsp 1st time. The spider is number 2, but i hate how he won't fight anybody offered to him. Gsp is 3. he fights anyone given to him. If he can win the mw bellt he would become number 1 p4p, but I want him to retain the ww belt, and fight mw at his current size, hold both belts and be greatest of all time.