My grandmother can't spin, even slowly, without getting sick. And I don't mean as an old woman, as a young woman it kept her completely out of dancing. Even a single, 360 degree movement over 2 or 3 seconds would put her in full-on motion sickness.

Yet she never got car sick, sea sick or air sick.

My wife, who also pretty much doesn't get motion sick in a car, gets violently sea and air sick and can't handle even a few seconds of an FPS game.

Motion effects affect people in a really wide variety of ways.