I like the original trilogy, and I can even see where Lucas was going with the Ewoks, though it would have meant a lot more if it had been the Wookies, I think. Still, RotJ is a bit of a let down, and you can see where Lucas started to pander as opposed to tell a story (Lando's un-death, Ewoks, and so on).
I think the new trilogy has some great moments... I love the depiction of the Jedi, and you can really see why they fell. Hell, even midichlorians ties into that... in a society of science, the Jedi Counsel refuses to believe in the power of the human spirit. The Jedi are robots at this point, having sacrified their humanity to the Force. It's why it's Luke that can defeat the Sith when they take out the Old Order. He still has his humanity, and it's his strength.
While I do blame the director for wooden performances, I think Lucas and whoever his casting director is made some terrible choices. And the writing for much of II is atrocious. At least the original trilogy managed a certain degree of hokey charm, but in this ultra-sanitary method of film-making it just falls flat.
Still, when all is said and done, I feel the same about the new trilogy as I do about Matrix: Reloaded... great action movie, if you ignore the pretentious crap.
Zahn's books are great, and while I never expect it to happen, I would love to see them be made into Episodes 7-9. I pretty much consider them as much anyway. I've only read a little of the rest of the stuff, but I wasn't too impressed with it.