What's your favorite game system?
That's tough... there are alot of ones I like for various reasons. Currently I gotta go with the Xbox 360. It has the best online service and much more exclusive content that the others just don't have.
But all time? Maybe the Sega Saturn. The games on it were just so unique! They don't make 'em like that anymore, and it keeps me coming back to the system, over 12 years after it died!