I certainly wasn't the only one in my theater who disliked it. I'm a bit of an elitist when it comes to movies, but my buddy Nate - who tends to be considerably less critical as long as there's plenty of action - actually nodded off several times during the movie... and the crowd in general, which was boisterous and loudly applauding everything from the end of the "omg refreshments are kewl" animated short that signals the end of the previews to the Lucasfilm logo to the appearance of the Star Wars Scroller outlining the plot... totally and completely failed to applaud at the end of the movie, and filed out silent and subdued.
People dressed up as Darth fucking Vader left quietly.
But anyway, whatever. My own rankings would run 6/5, 4, 1, 2/3. I have trouble picking a favorite between Empire and Return, and I have trouble picking a least favorite between Clones and Revenge. If the lightsaber dueling were only halfway decent in Revenge, it would easily win out over Clones; sadly however that is far far far from the case. The difference between the saber duelling in Episode I (the height of the series for fight scenes) and the saber duelling in Episode III is like the difference between hot impassioned sex with a kinky gorgeous girlfriend and jerking off tiredly to an old faded Hustler in a fertility clinic bathroom so you can provide a semen sample.