The last two movies have just stunk. I mean, really, something is rotten in Skywalker Ranch - and I think it's the putrifying corpse of the Star Wars series. While I think the casting was acutally OK, the scripts were totally worthless. I recall reading a review after the first movie that summed things up fairly well - it went along the lines of "There's only so much an actor can do with 'Dick and Jane go to Naboo'". I think it's quite telling that the screenplay for what is widely regarded as the best movie in the series (ESB) was not written by Lucas. Lucas is a good idea man and visionary, but quite frankly the last two movies have proven he's not the best screenplay writer, or director. It'a a shame too, because while I love the original three movies, these last two have kind of turned me off of the whole thing.
And the CGI - total crap. It doesn't blend into the background seamlessly like in LoTR as it should, no, it jumps out and screams "WHAM! Here I am!" - no wait, make that "Meesa here!" - and then proceeds to bludgeon you to death with it. Over and over. And over again. And again. (Side note: what brain trust came up with JarJar? Nice convenient marketing tie in guys. My only hope is that one day you are cornered in a dark alley and brutally beaten by a mob of Star Wars fanatics wielding JarJar action figures and shouting "Weesa gonna kick your sorry little a**es!". Wankers.) The stuff from the old movies is so much better, and all they used were models - but they looked real enough and weren't intrusive. The "Ooooh, shiny CGI!" thing is extemely tiresome, and not what I expected from the likes of George Lucas. Not at all. The only CGI I liked in either movies were the chrome spaceships - and that was what, 5min of footage at the most?
I liked the original movies, and it's not like they were particularly well written or acted either ("But... but you'll die." comes to mind...) - but at least the special effects added to the story rather than were the story. Yes, I can even forgive the Ewoks (actually I kind of like them). What happened with Episodes I and II was a crime. As far as I'm concerned, Star Wars is dead to me outside of Episodes IV,V, and VI - though I will still probably watch Episode III at some point. I've been through it this long, might as well stick around to see the final nail in the coffin.