I have seen the first three episodes, and as a GOT fan I am pretty disappointed. There are three main reasons I think: -The lack of humor. In Game of Thrones the humor (mainly sarcastic) is a fundamental aspect of the narrative. It seems lame without it.

-The characters. It might be connected to the above, but it seems to me, that almost none of the characters has the "charisma" and complexity to make them interesting. Rhaenyra and her uncle may be the exceptions.

-The drama. In GOT the complex characters and relations combined with the simple concept of the pursuit of power, creates a lot of interesting scheming over time. In House of the Dragons the scheming begins before we even get to know the characters (really get to know them!), and the consequence is that I don't really care...