Fans with Miami Heat tickets went through the ceiling with the signing of LeBron James. You can’t blame them. Pat Riley has a killer roster now, at least at the top end. Where he’s going to find talent to round out the squad remains to be seen. But the bigger question is whether LeBron James can be kept happy. James is talented but spoiled, uniquely gifted but tends to be demanding. And that’s being nice. LeBron James kept the Cleveland Cavaliers jumping to his demands for years, making everyone in the organization kiss his butt. Now he’ll have to exist on a roster where there’s better talent and it’s talent that he’s got to mesh with or the whole experiment will be for naught. It remains to be seen if that can happen.