Knobby has it spot on. No matter how out of form Nani is he will NEVER hide. He will demand for the ball, he will beat the first man. Valencia when out of form is disgusting to watch. Young is simply no use.
Unlike Young and even Forlan who found the club too big for them, Nani does not feel United is too big for him. He is absolutely comfortable at this club and that is the first trick. As capable as Valencia seems, in the big Champions League games he seems so subdued. Lately, his crossing has been simply horrifying to watch. @Sheesh, this is not about absence, I have always rated Nani highly and I will start him in every game that he is fit for. Every. Game.
A Loyal Fan.