Ronaldo is unarguably one of the best players of all time, and only a few footballers are worthy to tie his laces, but i'm afraid i do not consider Ronaldo to be a captain "material", let us be honest, Ronaldo somewhat plays for his individual accolades, he is less of a team player than what a captain should be, there are numerous times that the team have won, but Ronaldo was unhappy just cause he did not get on the scoresheet, now can we also talk about his discouraging body movements when the team is losing or when the game isn't going his way, that is not how you want your captain to behave, and if i were to be manager of Manchester United, i would definitely not be happy if Ronaldo is my skipper.