I have a very specific kind of motion sickness that seems to mostly revolve around videos or film, meaning I'm fine in cars or roller coasters, but if I'm reading in a car I will start to feel nauseated, and if I'm watching something like a handheld camera/phone filmed video I will feel sick for the next day. This also extends to IMAX 3D movies (only way I can explain it is that I feel like my eyes can't keep up with rendering the 3D and then get motion sick). At Disney, I can get a bit queasy on Soarin' (if not in the middle) and Mission Space can make me feel a bit off at the launch part, but I've never gotten full out motion sick on it. I put off trying FoP because I assumed it would make me feel sick, but finally tried it earlier this week, and unfortunately, it did make me feel motion sick. It was the same sensation as 3D IMAX movies (eyes feel like they aren't keeping up) combined with my normal jostled recording type motion sick because the ride kind of combines both. I did, however, recover pretty quickly from it after sitting for a few minutes and taking some non-drowsy Dramamine. I also made sure to not close my eyes, as I do feel like that makes it worse for me if I've already started feeling a bit nauseated.
Editing to add that I rarely get motion sick on Star Tours, but in the multiple times I've rode on it I've always been seated close to the middle, which seems to help for me (also, this is one where I can close my eyes if I start to feel anything, maybe because it is a bigger space?)