The SNES/Genesis/Game Boy era. I think the SNES and Genesis were the peak of pixel art, still limited by the TVs and CPUs of the time, but stylized. And some of the best games of all time came out in this era, like Final Fantasy IV-VI, Earthbound, Super Mario World, Donkey Kong Country, the first several Sonic games, the original Pokémon, Tetris for Game Boy...