Good thread; I was actually thinking of making this myself, guess great minds think alike! ;)
I think it's a relatively close contest to be honest. The Xbox and 360 were excellent consoles, but so were the Megadrive and Dreamcast. The Saturn I also have a soft spot for.
Was never a huge fan of Sonic, (though the 16-bit games were decent) but Sega did have a bunch of other great games; Panzer Dragoon, Nights into Dreams, Ecco the Dolphin, Altered Beast, Shenmue, etc.
Ultimately I think I have to go with Xbox as the 360 is for my money one of the greatest consoles of all time, and I personally rank it above any of Sega's machines. To Sega's credit, I think they put up a pretty good fight here.








