Just looking at how the lightsaber fights were concluded in the movies should give someone a good idea about their respective quality.
Episode I - Obi-wan, hanging on for dear life, does a huge flip over a stunned Darth Maul and gets revenge for his master. Well, probably not revenge, since a jedi wouldn't have feelings like that.
Episode II - Anakin displays his overconfidence a bit. Yoda does a bunch of flips and Darth Tyranus runs away.
Episode III - Anakin, in his arrogance, attempts to take the high ground and Obi-wan reluctantly cuts him down. Obi-wan then leaves him to die an agonizing death by burning.
Episode IV - Obi-wan sacrifices himself to become one with the force, in order to guide young Luke Skywalker on the path to becoming a jedi.
Episode V - Luke loses his hand to Darth Vader. No, I am your father. Luke despite his immaturity rejects the temptation of the dark side and instead chooses death.
Episode VI - Luke, after being pushed to anger and cutting off his father's hand, realizes what that path would lead him to and fully rejects the dark side once more. Darth Vader, unable to witness the suffering of the son who believes in him, finally finds the light inside himself and turns on the Emperor.
Hopefully Episode VII will have more to it than a simple emotion and a bunch of flips.