Funny to see SS and PCE mentioned together. Just one thing missing. SFC. These three together represent the best of everything. Some of the best gaming machines with respect to their era/generation (not to imply they are necessarily superior to their competitors, just that they are very adequately equipped to perform), vast libraries spanning most or all genres, and just massive amounts of amazing games, amazing works in general, including the little details like graphic design, soundtrack compositions, etc.
I chose SFC over FC/FDS just by a hair due to the help of higher fidelity audio and 16-bit graphics combined with the much larger library. The extra power makes it easier to deliver some seriously impressive shit (e.g. Tales of Phantasia, Tactics Ogre)
The majority of the Japanese game consoles have their shining areas but these three were the brightest stars. With these three systems, I've already gotten tons of memories of amazing stories, imagery, and music, and there's still HUNDREDS more titles to go through I don't even have...