T’challa is a Good Male Protagonist ™ mainly because he is humble and without the ego you see from so so many other male protagonists in blockbuster films
He defers to the wisdom of his mother, his sister, his general, his love, the women around him. He was a sweet and loving son who expressed and enjoyed physical and emotional tenderness from his father.
He’s proud but doesn’t ever disrespect anybody. He values family, affection and emotion and expresses it freely, but still retains the poise of a king.
That’s kind of rare in a lot of the mostly white, mostly male Hollywood protagonist lineup.