What's The Greatest Gaming Console

I've recently started my gaming collection by purchasing an NES, SNES, N64, and a Sega Genesis to go along with my Xbox 360. And while the collection continues to grow, a question came across my mind. That question is "what has been the greatest gaming console?" I'm sure you can find other forums on the internet debating this topic to death, and I'm sure at some point a Verge user has also posted this question.

So what do you think?