K-rock and I saw Star Wars: Revenge of the Sith last night, and loved every minute of it. Star Wars is so ingrained in the culture, and it is truly an epic, modern myth.
Revenge of the Sith is, perhaps, "deeper" than any of the others. There is more depth in that we see a darker side of the Jedi, we understand and have sympathy for Darth Vader, and we realize that there are many sides to the story of how the war evolved. I think they did a good job showing Anakin's shift to the Dark Side (given they have to do it in two and a half hours, not counting the previous two movies) and the rise of Emperor Palpatine. They also do a great job illustrating the chaos and confusion of politics and militarism. Whereas in all the other films we were fairly certain who were the good guys and who were the bad guys--we saw a clear dileniation between the two sides of the force--in this movie things are not so clear cut, and there is always confusion about who is good, who is bad, and how quickly our perceptions of such things can change.
It reflects our times.