In this case, Bioshock might have to take most of the love, seeing how recent its release was and how generally awesome the plotting and execution was. I'd assume MOTB's status as an expansion might hurt its stature. Only the dumb and the paid-off consider Halo to be anything approaching noteworthy.
Much as I'd like to see MCA get recognized for PST, or maybe even KOTORII, that ain't happening.