Fury is bipolar as hell he doesn't train like consummate professional excluding for fights he gets up for. He only brought a chef into his camps from 2018 onwards, which somewhat makes sense because he never made a dollar in boxing till he signed his ESPN deal after Wilder 1. He can win on half mass or no mass at all. Nobody would go into the 1st or 3rd Wilder fight in the condition he was and nobody can walk into Wilder's power and survive. Tyson Fury firing on all cylinders is totally unstoppable and unbeatable. When he blows through Usyk people might finally get it. He'll say "I told you so" and everyone will make excuses and say "he has to fight XYZ now or he's still a fraud!"
I used to rate him a fat, awkward, light punching regional level guy. Every step up I expected him to lose up until Wlad. I thought Chisora was the real deal, too, though. Now he has developed into a well rounded big man with a very nice jab, good head movement, elite foot movement, and great ring IQ. He is a hell of a fighter, it is a shame we won't really find out how good this version is because there won't be enough fights there ultimately.
His style of of fighting. His stamina, especially for someone that large. His recuperative powers. His ability to find a way to win.