Nooo...! My proxy ate up my post.
Anyways, what I was gonna' say where something like this:
Most of my fav's are already up there. Including Yoshi's Island that I was going to mention. Super Metroid is the king of all games, quite possibly the best ever. ( sorry fellow Turrican-fans, but Samus is simply unbeatable when she dons her Varia-suit)
Oddly enough, I kind of rank Metroid as more of an Adventure-game, and less like a platformer, so I'd probably say as a pure platformer, Donkey Kong Country probably takes the title.