I can't actually keep to one game, as much as I try, it's always going to be a split vote between Resi 5 and Fallout 3 for me.
Resi 5 and Fallout 3 have been the only games I've found to be exceptionally outstanding lately, everything else has been a massive pile of meh and indifference, Resi 5 has enjoyable Co-Op play, fun gameplay, Mercenaries mode is a great way to kill time and an interesting story.
While Fallout 3 on the other hand has, quite simply, some of the best gameplay I've seen in a long time, while also being heavily customisable, allowing you to roleplay with a significant amount of freedom, that, coupled with the DLC keeping the game fresh makes for something quite special.