My wife deals with motion sickness and has problems with the following:
Always (has quit riding these):
Star Tours
Smuggler's Run
Alien Space Saucer Spin
Teacups
Mission Space
Sometimes (still rides it and it's hit or miss)
Flight of Passage
She has only rode Ratatouille once and she said it was starting to get to her, but nothing bad. Would definitely ride it again.