Boxing ability. You cannot accomplish what he has without talent. Floyd had talent, but once they get to the big stage you can construct it more.
All of the above. PEDS definitely helped or he wouldn't take them. You dont win ALL of your close fights unless the judges go out of your way to give rounds. And lastly he does have talent. You don't reach his level without it. His record should really have about 2 or 3 more losses on it. De La Hoya definitely earned his cut.
Canelo owes the bulk of his success to the"Friendly" judges & his Ped's abuse. Yes the guy can fight but its a pity he didnt play it straight & just rely on his talents. Like Mayweather his legacy will always have a black cloud of suspicion over it