This is a "you may not be able to unsee" thing once you read this, but... one of the major problems I have with 3D movies is precisely that 3D based on image separation extends out way less than people think it does, because the brain naturally picks up with heuristics and prior knowledge and a lot of other things. So if you're on a closeup of someone's face or something, sure, it can be in 3D. But if you've got a big action scene with, say, helicopters flying around and shooting at people on the ground, the camera is likely to be farther than 20 meters away. If you can see any "3D" at all, it's wrong. It should all be at the plane-at-infinity for you. Which means that if you can see "3D", rather than being an epic fight to save the world or whatever, you've got a fight taking place on a diorama in front of you, about the size of a large table or something.
Even something just as the scale like the Transformers being about a block away from you brawling with each other should all be on the plane-at-infinity to you.
It kinda takes the drama out of 3D action. Technically, the 2D version of the movie is probably more actually accurate at the important times in a lot of genres.