Lets see, lets give descriptions because otherwise its just a "list topic" OK, here are mine:
1.Lylat Cruise : surprisingly its not something special but the graphics...OH MY!!! the asteroids and so many phases that make you feel you are really flying across Lylat is awesome!!!!! <33
2.Green Hill Zone: Okay this one looks plain boring but its a Sonic stage (YAY!) the checlpoint thingy is pretty original, the floor destructs sometimes in unpredictable moments, and what else Silver, Tails and Knux make a cameo what else do you want?! xD
3.Summit: The Icicle mountain was a nightmare but this is one of the best stages!!!! just think of it, its slippy, you suddenly start dashing thorugh the snow LOL!!! at highspeeds and in a diagonal way, not like F-Zero stage that moves but you are basically not moving, you get to the bottom full of water!!!! suddenly a bear starts to sink you and an extra if you get to the bottom a huge fish can eat you!!!! talk about action!!
4.Norfair: Okay I know I know this is the OH SO BORING METROID STAGE, even though its the same Planet Zebes, Brinstar Depths, lava rising level its still so fun to play but this is much better well Yellow acid was ok, but this lava red hot color looks more dangerous, and now just doesnt flow, it flows from the sides, and the best part from the background to the front, and its like the battle for the Smash ball but you battle for a safe spot how sweet is that? ^^
5.This one is difficult its beetween Halberd and Shadow Moses, but just cus Halberd is like Lylat cruise with an extra beam, Ill choose Shadow Moses, first if you are Snake you get a codec conversation!!!!!!!! thats always funny as hell, then you enter the stage that is fully destructible, plus you get those "!" lights that can catch you, and the best part the background explodes and appears a METAL GEAR!!! ^_^ so there you have it