Og XBOX because it offered many different AND better experiences than the competition in that gen. IMO.
Best graphics
Best loading
Biggest environments
Unique original experiences that were all exclusive.
(Ie halo, blood wake, crimson skies, odd world, wreckless, DOA3, Brute Force, Elder Scrolls Morrowind, Mechassault, Steel battalion, play your own music in GTA)
It didn’t have all the hits. But it was a grand machine all on its own.