* If tomatometer & audience score are within 5% of each other, you can trust the ratings to give you a decent indiciation of movie quality.
* If tomatometer is more than 15%+ higher than audience score, it means it's an artsy fartsy movie that critics like and movies don't.
* If audience score is 15%+ higher than tomatometer, it's a fun movie even if it's not oscar worthy. (https://www.rottentomatoes.com/m/old_school is a perfect example)
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The Last Jedi
Tomatometer 91% Audience 41%: Artsy Fartsy
[Really?]
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The Greatest Showman
Tomatometer 56% Audience 86%: Fun, not oscar worthy
[Won Oscar for Best Original Song]
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EDIT: Truthfully, it was the release of these two films (both Dec 2017) that caused the Tomatormeter and I to part ways. Simply indefensible, IMO.
[0] Think space-walrus cliffs, or red-salt Hoth, or lightspeed kamikazee, or the Snoke throne room battle
While I agree with your criticisms of The Last Jedi, I don't think you can under any circumstances consider this movie "artsy fartsy".
The Last Jedi is the anti-artsy fartsy movie, otherwise the term loses all meaning. It doesn't mean "bad", and an artsy-fartsy movie can be good. Focusing on just the technical or glossy aspects doesn't make a movie artsy, it just makes it bad.
So IMO we should cut the person some slack :). I don’t agree that it’s that way because ultimately that’s a movie by Disney not a movie by Rian Johnson, but it’s weird to say that technical aspects are somehow not related to art
It's of course a continuum -- few movies exist squarely in either the "artsy" or "entertaining" ends of the spectrum -- but it's a safe bet Star Wars is closer to the entertaining/spectacle end.
The problem with calling a Star Wars movie "arty fartsy" is that it twists the meaning of this term to mean "a movie I don't like", which I'd rather people did not do.