I feel like 3D platforming kind of peaked with Mario 64 and got worse and worse as more graphical elements were introduced. Collision detection on so many onscreen items became inconsistent, and there would be invisible walls everywhere limiting interaction in where you could go and what you could do.
A perfect example would be Jak and Daxter. While it's a fine game, it not nearly as satisfying to run around and jump and see where things take you. You're likely to approach a bunch of bushes or jaggy cliff and just brush up against an invisible wall. And Ratchet and Clank isn't so much a platformer as an action game with some platforming elements.
Even the Mario games that followed up Mario 64 feel neutered in comparison, especially the Galaxy games which are otherwise an improvement in every area.
To me, if a platformer character isn't an absolute joy to whip about while running and jumping then the game itself will likely leave me unsatisfied. In addition to Mario 64, I'd say Psychonauts did a good job with character movement and physics. But it could have used more speed and suffered from a gradual rollout of abilities, leaving the beginning rather dull and boring.