I can't even watch the Teacups spinning around, I feel so sick and dizzy...I've only ridden them once, when the kids were younger, and felt ill the rest of the day. Things that spin around in circles like that, always make me feel terrible.
On the other hand, Mission Space was a blast (pun intended)! Roller coasters, even those that loop, don't bother me, nor do drops like Splash Mountain.
Hubby, however, gets queasy on all roller coasters, even the mild ones, and once on Mission Space was enough for him - he felt sick the rest of the day.
Nothing, absolutely nothing, bothers our kids.
I guess it just depends on the person and the (maybe) state of their inner ears and balance!