Favourite console not made by today's Big 3

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It's a tough call for me, but I'm gonna go with the Atari 2600.

There's something really pure and elegant about its simplistic graphics and gameplay. I guess it's harder to fuck up simplicity. With the hardware's limitations precluding elaborate storytelling and graphics, the focus is solely on gameplay. Playing the best 2600 games can be an almost zen-like experience.