I get quite bad motion sickness and use tablets to help me enjoy rides.
Galactica VR on is the worst for me,
Followed by Smiler/Nemises which I always need a break after
Followed by Rita and Galactica (no VR).
Spinball
Wickerman
Oblivion
I have to be careful to pace rides, stay hydrated but with an empty stomach, have a sit down other than on the ride. I always carry chewing gum, as the mint helps (I prefer something weak, not the extra strong). I tend to find too many travel sickness pills make me feel very disoriented and affect my hearing - so I take half a dose (15mg Cinnarizine) and top up as I need it (usually around 2pm).