Here's my rankings (1 being best)
1. Return of the Jedi / Revenge of the Sith
2. The Empire Strikes Back
3. Attack of the Clones
4. A New Hope
5. The Phantom Menace
Given a lot of thought, I just can't rank either ROTS or ROTJ over the other, my reasons for loving them are so different, I can't weigh them the same. ROTJ is big with me because for me, Star Wars is about being taken to a place far different from the world I see day to day, and Jabba's palace really took us away from the world we know. Up until Jedi, the majority of characters in Star Wars were human, and with budgets and all, that was the best choice. Then along comes Jedi, and we see the many denizen's of Jabba's palace, Jabba himself, the large, jolly slug, a Rancor, a beast of size that just inspires awe to see in confrontation with Luke, we got the Ewoks (like them or love them, they were alien), we got intimate with the Emperor for the first time, and at the time ROTJ came out, we didn't know he was a deformed human, and he looked alien enough. Now, add to Jedi, the final revealing of Anakin Skywalker and seeing what lay behind the mask after ESB's **** tease, the first use of Sith lighting, an emotionally charged showdown between father and son, the convergence of friends in the spirit world of the force, the first green lightsaber, an amazing (especially for it's time) space battle that took us on a thrill ride like no ship battle in Star Wars movies had before. You add all of that up and everything in between and I think we were given an amazing film. As for ROTS, the first thing that ranks this film high with me is Ewan McGreggor as Obi-Wan. In episode I & II, Ewan delivered a great Obi-Wan, but I feel that in ROTS, we finally saw who Obi-Wan is; Ewan's youthful Obi-Wan and Alec's Old Ben converged into an amazing and admirable character that personified the spirit of the Jedi. Add to that an amazingly well crafted parting of two "brothers", the breakdown of deep love, the conspiracy of a manical madman capping off with the execution of Jedi all over the galaxy, a showdown between the two most powerful members of each side of the force, some of the most amazing environments we've ever been taken to, an amazingly designed new background villain, and to me, the most emotional involving story in the entire Star Wars saga, and you get a film that pulls you in from the start and holds onto you even when it's over. The first time I saw ROTS, I cried watching Obi-Wan leave his fallen brother behind, and in the end, I found myself wanting more, the film captured me so much I wanted more of it. People can criticize the PT all they want, and I have my areas I wasn't thrilled with it, but ROTS was a redemption of that trilogy, and a highlight of the saga.