As far as media interviews go, I don't think he enjoys interviews in general unless it's about the charities he is supporting. You can't really blame him if he doesn't care for prying questions on his personal life, which most interviewers tend to target. I think he does a pretty good job of swatting the questions away with fairly good humor from the interviews I have seen. The media interest comes with his position and is intense because of who he is, but it doesn't mean he has to enjoy it.
I also don't get the impression that he wants to walk away from his duty and obligations. Like his father, his destiny is sealed and he will meet it when the time comes. However, that is many years off yet and at this point in his life, he is entitled to enjoy what freedom and privacy he can, while he can. He is still only 28 years old and has quite a few years to grow into his future role.
I don't get the sense that it's easier to be in William's position at all. He hold the future of the monarchy in his hands and therefore the expectations from the RF and the public are much higher. He may be allowed a certain latitude at the moment while he is serving in the RAF, however when his time is up there, he will be expected to get on with it and start taking on much more responsibilities in preparing for his future role.
Harry on the other hand will never be expected to take Williams place unless William were to die before he produces an heir. Harry is free to make his life what he wants to make of it. IMO, Harry is more wild and carefree than William, but I don't see that this is a personality that fits well into the role of a Monarch. William is more serious and reserved, but he has a fun sense of humor as well. He reminds me very much of the Queen in that respect. When William's time comes to ascend the throne, I think he will do the job very very well.