Reading the ‘https://boards.straightdope.com/t/so-which-fictional-vigilante-hero-would-be-plausible/945462’ got me thinking in the other direction— what plot elements make you say no, uh uh, not gonna do it, and take you out of a TV show or movie?
For an example of what I can suspend my disbelief for, Iron Man was mentioned early on in the vigilante thread. I enjoyed the Iron Man movies and the character in general. If I really wanted to, I could find weaknesses in his ‘plot armor’. For example, if Tony Stark is thrown against a building or his feet rockets fail and he falls hundreds of feet to the ground, his armor is not going to stop his brain from sloshing against the inside of his skull like jello. But heck, I don’t know, maybe Tony build some inertial damping technology into the suit. In any case, I can deal with Iron Man.
Bu to take another Marvel movie as the opposite example, I could not watch all of the second Thor movie. It involved Thor fighting all manner of creatures and weird foes in Asgard using magic. I seem to remember a lot of colorful energy beams and such. No thanks. Magic (or magick? Real magic as opposed to tricks), I can’t deal with. There’s no rhyme or reason to it. So no sword and sorcery for me. The sword part is fine. I could tolerate ‘Game of Thrones’ only because it had much more of the former than the latter.
Another thing I can’t stand is the “something terrible or weird happens to a main character but it turns out to be just a bad dream” trope. And not just because it’s badly overused, especially in horror movies, but because nobody dreams they are watching themselves. They experience a dream in first person mode, as they would normally. At least, I always do, and I imagine most people do as well. Maybe that’s just a weird quirk of mine, but I can’t stand the ‘just a dream’ trope for that reason.