Can I just say how much I love the dynamic between uncle and niece? And I also love how despite his jealousy and own ambitions for the Iron Throne, Daemon obviously loves his brother and niece very dearly. Its a sappy way to look at it but Matt Smith effectively conveys these conflicting emotions. Its hard to hate Daemon fully although he is being portrayed as a heel when he easily reneges a position of advantage because he could not bear hurting his kin. And when Lord Corlys starts to badmouth his brother, even though just an episode ago he was doing the same, he puts him in his place and says that only he is allowed to talk badly about the King. It was so much fun to watch.
I liked how the world was consistent with that of GoT, from the costumes to the characters. Knowing that these events transpired before the Long Night truly adds a new layer of appreciation for GoT. It was also bittersweet because House of the Dragon very clearly underscored the importance of the role of the Targaryens in the prophecy, none that really materialized in the end of Game of Thrones because showrunners were too busy wrapping things up to work on their Star Wars deal with Disney.