I've only ever walked out of one movie in the theater*
The wife and I walked out of a few movies, but only because they were so over-the-top they became excruciating. I think
"Hot Shots" with Charlie Sheen was one of them. Came very close to hitting the exit during
"Django Unchained".
(BTW check out "Margin Call" for a captivating dialogue-only film).
Ooo, that's a great example! Happened to catch that by accident a few years ago, became riveted. But it could easily not have been so riveting were it not for the sheer scope of the problem that drives the movie.
Sometimes I think it's all a crapshoot. But my standard for movies is, am I absolutely captivated by something in the flick? It could be snappy dialogue, a food fight, a supernatural or Twilight Zone element, or a really big explosion. A moment that was filmed perfectly from a cinematographic perspective. Pure pathos. Killer action. Sometimes pure pathos AND killer action ( see:
"Highlander (1986) ).
The older I get, the fewer SFX it takes to captivate me. Good example:
"A Sense Of An Ending" (2017), a low-key British film I caught during another channel surf. Felt like it was made-for-PBS modern melodrama (aka, boring). But I saw enough in five minutes to make me sit thru the whole thing. Afterward I contemplated what regrets I had from my younger years, and what I wish I would have understood or known about back then. Then again, 9 out of 10 folks who see the flick might go "eh".
Another example:
"The Age Of Adeline" (2015), which I selected for one of our movie dates that year simply because I was intrigued by the synopsis. I absolutely loved it. Mrs. Z was barely whelmed.
Yeah, sometimes it's just a crapshoot.