I shall tell you the story of FrankenPod. One iPod had a broken hard drive; one had a tear in the connector to the screen. I managed to reassemble a funtioning iPod from the pieces of each. Eventually, though, it became too onorous to find the old-style iPod charging cables, so I had to move on. But I do miss FrankenPod.
I wear glasses, so 3D glasses on top of my regular glasses are annoying. Some 3D movies make me motion sick, too (not always, but sometimes). But i do it anyway because friends/family are worth a bit of discomfort . I don’t feel super strongly about it or anything, but that’s what I have against it.