I guess i would say Return of the Jedi. Where you learn it wan Obi Wan’s pride and hubris that led to the creation of Darth Vader. How he had tried to persuade Anakin back to the good side. None of that was in the prequel films.
Nor was Owen Lars Obi Wan’s brother, and Leia’s real mom did not live beyond the birth of Darth Vader.
I kind of wanted to see Anakin as a good friend, a great starpilot and a cunning warrior. That he wanted to have a son and leave him his lightsaber. But i don’t want to rehash the problems i have with the prequels.