Donkey Kong Country for me. - Visually it was the absolute cutting edge at the time... And artistically, it could hold it's own, especially in Donkey Kong Country 2 and 3.
But the audio cues is where Donkey Kong really pushes ahead in my opinion, who thought the SNES was capable of such music?
Gameplay wise, it's a run and gun platformer, but Donkey Kong Country 2 and 3 successful built upon those foundations and substantially expanded upon it.
--::{PC Gaming Master Race}::--