The dialogue more than the CGI in episodes 1-3 are what bothered me. They could have done so much with the Jedi Order and backstories of the Sith but they didn't. 3 was alright, but there were way too many times i said "That was cheesy" instead of "that was awesome."
I liked 3 because it brought back the dark, bleak feel that made Empire Strikes Back so good. It could have been great with a different Anakin. Hayden Christensen was beyond terrible. I think it could have been the best in the entire series, but the dialog and, mostly, Hayden's stiff acting knocked it down. I'd still consider it a fair addition to the 4-6 family, though. Hopefully the new flick is as good as advertised and up to what we've come to expect from Abrams.