I hate these stages: Green hill zone, Fall A LOT (custom stage), and SPIKES!!(custom stage).
My top five are:
1.Overworld (Kid Icarus themed level)
2.Dark Palace (Zelda themed level)
3.Battle Field
4.Final Destination
5.Temple
Fall A LOT has no floor, only moving platforms.
SPIKES!! is full of ice, gaping holes, and the entire bottom is filled with spikes.
Green Hill Zone was a great idea, just the wrong area of the level.