As a senior citizen (73), who still loves to visit WDW solo, I have noticed that as I age, the rides involving bumps and jerks tend to be rides that when I do get on them, I find myself hoping that they will soon be over.
As I said on another post recently, I love Splash Mountain, Tower of Terror, and Expedition Everest because they are smooth and very enjoyable (to me), while rides like the Big Thunder Railroad Mountain, Dinosaur, and Star Tours jerk me around too much.
But to tell the truth, I really didn't enjoy the jerks and bumps when I was younger either.
To each his own I reckon.
Enjoy.