SNES.
The "16-bit era", i believe, has the best games and introduced/expanded on many features that made games great to begin with.
Examples:Final Fantasy III (VI), Chrono Trigger, Star Ocean, Star Fox, Super Mario World, Terranigma, Mega Man X-X3, Super Ghouls 'n' Ghosts, Gradius III, ActRaiser, Pilotwings, Street Fighter II, Secret of Mana, The Legend of Zelda: A Link to the Past, F-Zero, 7th Saga, Super Metroid.
Overall, i have had great experiences with both consoles, but the edge i give to the SNES.
Looking @ this makes me feel old...PROUD owner of NES, SNES, GENESIS, TurboGrafx 16 (PCE), N64, PSOne, PS2, Dreamcast, Xbox360, and PC.