I've held the same sentiment as Moviebob for a while. Episode I was bad, but visually pleasing and still maintaining a tiny bit of tangibility. The sets had some grit to them, and it felt like a lot of effort had been put into it.
Episode II replaced just about everything with CGI, filled it up with a vapid, God awful love story, and made everything look too clean. Episode III tripled all of that, attempted to be 'grittier' while still having toy-robot death cries, and utterly collapsed in on itself. I fell asleep in those movies.
This could have a lot to do with Lucas admitting that he looked at old creationism/deity stories to come up with the plot, too. Anakin was a whiny, spoiled brat that pretty much just got a wife because that's how it goes in those old stories; a highly unlikeable character gets a wife just because a wife is a possession and would fall in love with the character even if he was a giant festering boil.
I guess I was never a fan of Star Wars, though, and that's why I never felt enraged at Episode I. It was just...bad. Not horrible, but not good.
Honestly, I thought the series fell apart when tiny teddy bears were beating storm troopers with pointy sticks, but maybe I just don't 'get' it.