Armored Armadillo's and Overdrive Ostrich's stages from Mega Man X1 and X2 are two of my favorite stages in the whole Mega Man franchise. Maybe it's because I love going fast! On the other hand, I have always hated the bike segments in Mega Man 5, X4, and X5. Like many others, I also dislike the mine cart stages that Rareware seemed to have a fetish for in all the Donkey Kong Country games. The difference is in Mega Man X and X2's speed-focused stages the player has the option to stop, slow down, or leave third ride entirely. The other stages, on the other hand, are entirely on-rails autoscrollers that limit the player's controls.
Thesis: Removing already-established control from the player for the sake of spectacle is bad game/level design.