JareBear: Remastered
her character motivation was getting what she believed was rightfully hers, and revenge against the people who wronged her. We see things from her perspective, so we have empathy for her, but we can say the same for Jaime and Cersei in the books. They're still awful people, but GRRM's brilliant characterization succeeds in humanizing them.
It's easy to pat yourself on the back for a good deed that benefits you, like "freeing" Unsullied to do your bidding, or "freeing" Meereen to rule it in the stead of its previous masters, but that does not demonstrate virtuous character in the least. These are acts of convenience in pursuit of power.
Every time she acts mercifully, she does so at the behest of her loving advisers who urge her in that direction by citing pragmatic reasons. They try to project their kindness and empathy onto her at every step, but they would not need to if she had it in her heart already. They tell her to act mercifully so that the people will love her more and think she is a fair and just ruler, and she wishes to please them, and wishes to be loved, and wishes to rule effectively, so she assents. Without those advisers in her ear, though, and after coming to the realization that she cannot rule Westeros with love or claim birthright, only fear, she chooses the pragmatic again: mass slaughter, fire and blood, punishment for not loving her.
Remember that she has a kingdom in Essos she doesn't give a single thought to, with a vicious sellsword left in command while she crosses the Narrow Sea to conquer. Upon realization that she will not be loved in Westeros, and that Jon is the rightful heir and the will of the people, she could just as easily turn around and leave to her kingdom in Essos and let Westerosi handle Westeros. Instead, she razes a city of one million people to the ground and sacks it with foreign hordes.
Dany acts in Dany's interest.
Jon Snow is the embodiment of heroism in this story, sacrificing his own life to save others, continuing to fight even as it sickens him in order to protect innocents and comrades and fulfill his duties, and not propping himself up afterwards or seeking any acknowledgement or reward for his deeds. He rescinds his power on multiple occasions when it serves the greater good.
Jon's hero's journey will end with slaying the dragon -- the one he loves.