I would go for Super Mario RPG and definitely Zelda: LTTP but I love the SNES and LTTP is tied (a 3 way tie) for my favorite game of all time.
Currently dreaming of: DKC4 or Sonic the Hedgehog 4 (classic 2D platformers) for WiiWare, Smash Bros. for DSi, New Super Mario World for DSi, a Wii remake or true sequel of Final Fantasy Tactics.
One down, hopefully more awesomeness to come.