It is all relative by the way, so longevity v intensity is only useful when comparing fighters. I still might have Tyson above other fighters with more spread out success.
fighters who are dedicated to their craft, those willing to go the extra mile, those who dares to be great, ..............knockout power, speed will be nice too though.
those fighters, where you know, that they will put it out there. But not just fighters, who are willing to fight, but fighters who are willing to fight AND maintain their composure and technique. we just had one hell og a fight, involving 2 of those types of fighters, which was marquez - diaz.. such a fight represents boxing at its best.