The Room is considered a movie so bad it's good, but if it turned out that Tommy knew what he was doing the whole time, would that make it just a good movie?

Sometimes, it's more important that you enjoy the thing than the thing being objectively good. There is merit to objectively analyzing things, and there can be enjoyment found in doing so. There is also merit to just enjoying the thing you like. Both are valid.

Know how to tell of a person is a movie snob? They'll tell you.

I hate going into a movie with expectations. That’s the quickest way to end up hating it. Even if I might be a fan and am looking forward to a particular film’s release. It’s far easier just to go in to a film with few expectations. Things that make a movie “bad” for me are: bad acting, bad writing, bad effects, or bad plot contrivances. IOW, something so egregious it pulls me out of enjoying what I’m watching and draws my attention to it.

For example - the new Star Wars films. They were fine for a cast of relative unknowns. Yeah, they had some heavy handed writing in spots that was bad, the worst being the pointless casino and kid scenes in the last one. But regardless it was fun. The previous three otoh had a stellar cast yet some of the worst wooden acting, writing, and the abuse of digital SFX was offensive.

(Best SW film made was Rogue One, IMO, tied with ANH because that introduced us to the franchise and had no baggage.)

Of course this is all movie dependent. Spoofs and the like or comedy are entirely different vs something like a drama. One won’t be held to a high standard, the other will need it to keep the audience engaged.

I think a lot of movies fall into that category tbh it takes a lot of qualities to stack up for the movie to be bad or good and most fall somewhere in the middle

This is more an arthouse thing for me, as if the story becomes completely incoherent I just assume it’s expressionism and I’m being challenged.

There are good movies, and then there is Popeye The Slayer Man. Nothing in between for me.