Well, my personal favorite game of all time is TES 4: Oblivion. The reasons I love that game are numerous but if I were to try to argue for it as being objectively the best game ever...
I guess I could say that the combination of older RPG mechanics with streamlined modern gameplay, mixed with a immensely beautiful fantasy world, flawless soundtrack, epic world-shattering plot, two of the best expansions ever made (KOTN and SI), absurdly legendary guild quests all come together to make it a true work of art.
We seriously need to ditch console exclusivity. No consoles today (other than the ones Valve has made/are working on) are even remotely worth having exclusives for. Just let people play games on whatever platform they prefer.