T'Challa: If you weren't so stubborn, you would be a good queen."My son, it is your time": I loved Black Panther. Not a standard action hero movie, it has a level of depth and self awareness that I have found lacks in most other DC and Marvel cinema adaptations of their respective pantheons. [I still like the Batman trilogy best; I am super biased to the lack of Batman's super powers, and the darkness of his near perilous dance with vengeance vs justice compels me.] Black Panther is a close second.
Nakia: It is because I am so stubborn that I would be a good queen.
King T'Chaka: [to his son] You are a good man, with a good heart. And it's hard for a good man to be a king.
-- from Black Panther
The nobility of the positive leadership is refreshing. When so many stories give us moral ambiguity in the portrayal of "interesting" characters (read corrupt, corruptible, or flawed), the core positive characters of Black Panther are unyieldingly, straightforwardly, awesomely, good.
At the heart of this is a question of leadership, and neither stubbornness nor a lack of goodness is what makes T'Challa and Nakia (amounts a few others) good leaders. Edmund Burke said "The only thing necessary for the triumph of evil is for good men to do nothing." King T'Challa is a good man who was willing to something. Driven by desire to serve and improve the lives of people, he is unwavering in his focus, and therefore offers what all great leaders offer in time of difficulty, hope.
T'Challa: Wakanda will no longer watch from the shadows. We can not. We must not. We will work to be an example of how we, as brothers and sisters on this earth, should treat each other. Now, more than ever, the illusions of division threaten our very existence. We all know the truth: more connects us than separates us. But in times of crisis the wise build bridges, while the foolish build barriers. We must find a way to look after one another, as if we were one single tribe.