I have now seen all 7 SW movies at least once in the last 30 days.
ANH is absolutely a cinematic feat, a milestone, iconic, etc... but it feels like a product of its times, too -- and to me, action/kid and YA movies of the 1970s were incredibly silly affairs. It's a fun, light-hearted romp. I love its designs, and I love how it captured the imaginations of a generation of nerds, but at its core it's a goofy 1970s action flick.
ESB is more than ANH in all the good ways: looks better, action is weightier.You really have the feeling something bad could happen to one of the main characters at any time, which is one of the reasons the emotions run deeper and it really expanded on the mythology (in ANH, Obi dies, but he let Vader cut him down).
ROTJ is more than ANH in both good and bad ways: it looks even better, has even more action, a great new addition (McDiarmid) to the cast, and an awesome final confrontation between good and evil. But the story is lazy, and it went even further into silliness/absurdity than ANH: e.g. instead of showing us a scene that harks back to older action films (Luke and Leia's swing across the Death Star) we have it told to us (Chewie's "Tarzan" growl as he swings on a vine).
TPM is awesome. I'm sorry. I know it's dumb. I know that it is socially unacceptable to admit this, but I like it. Boss Nass 4eva! Too much painfully forced humor, and I could do without Anniekins (it frosts me that he wasn't, say 18-21 when the Jedi came across him), but this is a great popcorn flick.
AotC and RotS are... Remember where I just said I'd seen all of the SW films in the last 30 days? Well, I didn't say I saw each movie in one sitting. I just couldn't sit still for these. I paused these movies probably 30 times while I looked for chores to do, messages to respond to, dogs to pet, etc. That said, I thought Dookula was cool, and under the hands of a less inept writer/director, could have made a really great tragic character (a basically good guy falling from grace due to frustration/ego); McDiarmid and McGregor did their best to rise above the garbage lines they were given, as well, so kudos to them.
Honestly I think Force Awakens is getting unfairly ripped on as a remake of A New Hope while people are forgetting that ANH was pretty much considered a Hidden Fortress remake, or at least heavily influenced by it to a large degree. I think it's fair for TFA to take and borrow story elements from ANH when that film borrowed as much from Kurosawa as it did.
I think viewers are more sophisticated and have a higher standards today than they did in 1977 (thanks, rising quality of film and Internets). A hardcore fan can tell you 100 ways Starkiller Base differs from the Death Star, but to casual viewers, they see it and say:
Oh, the Death Star, ONLY BIGGER. *face palm*
Then they see the Rebel... er, Resistance War Room, and from there forward can't shake the feeling it is exactly the same movie, even though it's totally not