For me, it's gotta be the SNES. From Super Mario World and Yoshi's Island to the Donkey Kong Country trilogy, from A Link to the Past to Demon's Crest, from Super Mario RPG to Contra III, it's just full to the brim with amazing games that have aged like fine wine. Beautiful 16-bit pixel art, no load times, a , reliable hardware, (mine still works 26 years after I got it) a perfect controller, it really is the full package and the greatest console of all time in my book.
360 is great too; also packed to the rafters with quality games, (in fact my collection for it is my second biggest of any system) with a comfortable controller, impressive power for its time, and the better version of most of its generation's multiplatform titles. It doesn't have quite as many diamond-class classics as the SNES, and it does lose a few marks for the reliability issues of the early models, but it's still my #3 top system ever.
