Empire is easily my favourite and I'd rate Jedi probably on a par with the prequels.
I love Empire for so many reasons. And here are a few of them....
Yoda. The dude rocks. And even though he kicked *** in AOTC, he's never been better than he was in ESB.
Han Solo. The guy stole the show in A New Hope, but here his character is developed so wonderfully and his relationship with Leia is fantastic. Lawrence Kasdan is a great writer, and Lucas could have used his help fleshing out Anakin and Padme's relationship in the last film.
Lando Calrissian. I'm a big Billy Dee fan, and I've always loved this character.
Vader vs Luke at Bespin. A fantastic and long confrontation. Probably the best scene in all the Star Wars films. I loved the lightsaber duels in the prequels but the biggest problem was they were too brief, or ended too abruptly.
Now I still love Return of the Jedi, but I still think that film has a lot of flaws. Here's a few of them...
Han Solo. He was so great in Empire, but he's forgotten here. Harrison Ford gives a lazy performance also. The character isn't developed any further at all, and occassionally he gets a little annoying.
I don't hate the ewoks as much as some people, but I'm no huge fan. And I freakin hate Chewbacca's Tarzan yelp as he swings across the trees. What the **** was Lucas thinking there?
Jabba's palace is also too childish, Boba Fett's death is stupid and some of the scenes on Endor drag.
However, Jedi has a great deal to enjoy, particularly all the scenes involving the Emperor.
Craig