I agree with pretty much everything Caston said; I’d pick the sequels too. I don’t “like” any of these; but my favorite movie after the originals is the Force Awakens(It’s much lower though), and I like that way more than I like any of the sequels. The middle episode is the low point for both trilogies, and it’s an insanely low point.

The prequels are more damaging overall also, for the reasons mentioned above(the stupid changes made in 2004 to better “fit” the originals with them) and just the fact they were supposed to be the important backstory. Episodes 7,8 and 9 can very easily be ignored. But like it or not, Empire has Episode V in its opening and VI in Jedi. (Depends which version you watch for SW, even prior to the special editions)

Also, I really hate how George Lucas tried to reframe the saga as “The Tragedy of Darth Vader” when the originals were clearly written for Luke to be the main character. This isn’t a big thing for which trilogy I prefer, merely a reason I hate the prequels and what they did to the series.

Both trilogies ruin a lot of characters, so I’m not sure which is the biggest offender. My head tells me the new ones, but because the prequels take place before the originals, I’m inclined to say those.