I don't generally pay much attention. The old ones had tons of atmosphere, new movies generally don't. It's a lot of jump scares and not a lot of foreboding dread.
I think it also has to do with changing audience tastes. In 1931, Dracula got away with slow sweeping scenes, and bats on strings, because it was new and audiences hadn't seen it before. It was scary simply because it was unfamiliar. In 1973, The Exorcist, again, got away with long sweeping scenes, and little gore because it was a subject that Hollywood had previously been either unwilling, or actually prevented from touching due to the Hays Codes. It was not until this time period that movies like Rosemary's Baby (in 1968) and The Exorcist were able to get away with the subject of demonic possession and Satanism as a theme for horror. For one, the extremely pro-Catholic attitude that Joseph Breen brought to the application of the Hays Codes made deriding Christianity, either satirically, literally, or even by just the discussion of Satanic ritual rendered movies like Rosemary's Baby and The Exorcist completely unmakeable within Hollywood. In the 1980s, when slasher flicks became popular, it was just downhill from there. Once you introduced blood to the equation, the only way to go to satisfy the audience was with more, more, more, until you devolved into completely unnecessary gorefests that lack any kind of subtlety or intrigue like what we get today.
Sticking with Star Wars you know it is a product of the 1970's-1980's from the hair styles of Mark and Harrison.
Out of the original trilogy, Empire seems to be the least dated from a production design standpoint. The use of shined sets and costumes for the Empire contrasting against the Rebellion's makeshift looking hideout in the middle of a frozen wasteland was a very modern look for the movie. All of the sets and costumes for Empire were modern, really. Star Wars '77 had an extremely 70s spaceship look. Just looking at any of the computer terminals on the Death Star: the sparse use of knobs and switches and random flashing lights on flat, painted panels was a very popular look for that era. You saw it in Star Trek, 2001: A Space Odyssey, Lost in Space, etc. Those are all '60s era, but they all had that same look. And this isn't even getting into the massive sideburns present at the Death Star roundtable, and any of the other officers on the Death Star.
RotJ, too, had a very "early 80s" look. Not just in the production design, but in the way that it was filmed. The film stock itself looked very 80s. It's not polished and clean like Empire's was, or even as much as Star Wars was. It's got this grit to it. But as far as production design went, the thing that struck me as the
most early 80s in the look of the movie was Luke's tunic that manages to pop open during the finale - as the same exact thing happened to Kirk's tunic in Wrath of Khan during its respective finale. And, in fact, many spacefaring science fiction flicks of this time period used tunics that, for some reason or another, would always seem to pop open.