Beware, this post will be enormous.
First of, I'm probably the least biased person to discuss this, since I only watched the original trilogy recently. I mean, I had seen bits on TV before, but only like, 2 weeks ago, have I really sat down and watched through the whole episodes IV, V and VI, and they did everything (minus the special effects obviously) better than the new ones.
A lot of people misunderstand the appeal of the original Star Wars (mostly because of what Lucas has done with the prequel), but what got people pumped was not the special effects or the huge lightsaber fights, there were a whole 2 saber fights in the first 2 movies, what kept people chewing their seats to see what happened next was the entirety of the movies. The characters were well defined, had strong personality and were very humanly flawed. You could sympathize with them because they felt human despite the blasters and lightsabers. You weren't watching these movies for the CGI, you were watching cause you had to know what happened to Luke, Solo and Leia and what was Darth Vader's next move.
Each of the original 3 movies has a whole movie's worth of well edited story to it: A new hope is about finding Luke and how the "team" delivers the first big blow against the empire by destroying their precious Death Star, The Empire Strikes Back is about show how the Empire gets back on it's feet after the loss of the Death Star and pushes the rebellion back, leaving our "team" in a bad spot, and The Return of the Jedi is about how Luke had finally become a full blow jedi and was going to fulfill his destiny, and how the entire story was about to culminate in a "it's now or never" moment.
While not without it's flaws (we have to remember the original trilogy was done in 1977, 1980 and 1983 respectively, around 30 years ago), the trilogy as a whole is amazing, and each movie individually is spectacular. They never sacrifice story for "hey look what we can do with the special effects!".
But it seems like after this Lucas said "fuck you all with applesauce, MONEY 4 ME PLX" and every movie since seems more like a contrived excuse to pump out a new SW title. Most of the new movies had potential, REAL potential... But instead of thinking these stories through, Lucas just pumped them full of CGI so easily impressionable "new" SW fans would be hooked over the special effects... And that's where the fault lies, the focus shifted from an amazing and coherent storyline to the special effects...
Episode I seems like an attempt to replicate Episode IV in a larger scale, and it could have worked, really it could... But instead of a strong storyline it seems Lucas just copy pasted A New Hope and, since it was too much trouble recreating the whole story so it wouldn't look like a blatant rip off, he just substituted the REAL story for action scenes pumped full of CGI to keep viewers busy long enough to forget about the lack there of a story... And Medichlorians? NOOOOOOOOOOOOOOOOOOOO, biggest dick move in the business EVER. You don't try to explain "magic", and if you do, you do so tactfully... Lucas just steamrolled all over it... It would make perfect sense if they said something along the lines of "Jedi can do these things, because we're all essentially made of energy, and the universe is made of energy, Jedi are basically the ones amongst us who can connect their energy with everything else, allowing them to control it to an extent" and TADA! You "explained" a bit more about the force without ruining everything... It would all make sense then, "the force is everything".... But no, Lucas said "fuck you, give me money, I'm too good to think".
Then we had the clone wars which really are about NOTHING. They're just displays of CGI with like... a whole 5 minutes of plot to it... It really just strikes me as Lucas going "Hey hey...look what we can do. ..Shiiiny, right?" And it had soo much potential... Jango Fett, the Arc Troopers... Once again we get George Lucas shitting in our faces and going "aha, fuck you, money now".
And then we had what to me is still the most disappointing movie in the series, not because it was the worst, but because it had the most potential to begin with... "It's the birth of Darth Vader... How the fuck do you ruin THAT?" I thought...But Lucas delivered, in all the wrong ways...
The movie could have been truly amazing... But instead of trying to make us sympathize with Anakin by creating an ambiguous set of circumstances that led him to inevitably turn to the dark side, we're handed a spoiled emo kid... WHAT THE BLOODY **** JUGGLING FUCK??
George Lucas had an endless stream of possibilities.. My favorite would be for the council to legitimately give Anakin a reason to abandon them... Like ostracizing him or completely ignoring and even somewhat mocking him... Not only would this make the council feel more realistically humanly flawed, but it would also justify why Anakin could feel betrayed and outcast.
Instead we're given an Anakin that goes: "WHAAAAAAAAAAAAAAAAAAAAAAAAAA...I'M THE YOUNGEST JEDI TO JOIN THE COUNCIL - EVER -, I'M HERE BECAUSE THE EMPEROR CAN'T BE SO I WAS TRUSTED WITH THIS WHICH WOULD BE AN UNMEASURABLE HONOR TO ANY JEDI, BUT I WASN'T INSTANTLY GRANTED THE RANK OF MASTER JUST BECAUSE, AND THE COUNCIL DOESN'T FULLY TRUST ME JUST YET....BWAAAAH, MEANIES! I'LL JOIN THE DARK SIDE! /wristwithlightsaber"
...What?
And the new clone wars seems even worst... It seems like a re-thread of Attack of the Clones, but with even LESS story and MORE CGI.
So yes, there is a reason why SW fans hate the new movies, because they are the most blatant symbol of selling out there is... And it keeps getting worst... The force Unleashed? Wtf George... Wtf... After the Dark forces/Dark Knight series one would think you would have learned a thing or two...