Episode IV: Great world-building and character development, I actually very much enjoyed the Death Star escape sequence too, I'm unsure if this one was my favorite or if Empire Strikes back was.
Episode V: I respect it a lot-- because I can see a lot of classic moments that I wouldn't have otherwise recognized mostly because the Star Wars films seemed to have been like a 'stepping stone' for other Sci-Fi and fantasy things, so like the Yoda sequence and that whole debacle was very good, as well as Han and Leia's character developments.
Episode VI: I might get some back-lash... but I didn't like this one, not nearly as much. Maybe it's because I kind of knew what was going to happen already at the ending climax (I mean, even as an outsider to the Star Wars series, I think everyone knows what happens with Darth Vader at the end there), and that was probably the best part of the film. I thought it dragged on way too long in the beginning with the Han Solo rescue, and the Ewok thing just didn't really grab me. Probably my least favorite of the triology, but it's still LEAGUES better than whatever the hell the new movies were. I just felt the character development was lacking in comparison to the other 2 movies, but it was still a good ending at least.
I watched the movies out of 'order' I guess, like I watched the new movies with Rey first before I had seen the others, and I thought they were just... not good-- to put it gently. No offense if any of you all liked them, I just really did not enjoy them.
Then the Anakin ones, I actually really much enjoyed myself. There wasn't really one I wasn't fond of, because I liked all of them there, great-backstory and I'm honestly glad I watched them before I watched 4,5,6, because I actually 'care' about Anakin/Darth Vader as a character by the time he made his debut, and I wouldn't have cared much at all if I had just watched 4,5,6 without the context of 1,2,3.
Those are my brief thoughts, I'm glad I watched 'em at least. I respect the series for laying so much ground-work for other fantasy/sci-fi series like I said, and I can see why it's beloved.