A lot, I'm 100% sure he wants to be the player with the most PL appearances ever and then he needs to get fit soon.I do wonder how much desire Milner must have now to get back fit? He must know it's unlikely we will extend him. He's not exactly thrown himself into Sussex either, still weekly commutes (by helicopter) from his family home up north to his rental down here, has not moved his family down.
Also, he's human so likely to generally prefer not being injured.