What are your other 2 out of interest?
Holding off until the end of the year on Destiny to make a decision, going to see what fixes they implement, it's angling for number one due to personal shooter/bungie bias, doesn't deserve it without some multiplayer fixes though.
Wolfenstein is top three for the old school shooter feel and a surprisingly engaging story.
Others in contention are DKTF and Mario Kart 8, more so DKTF. Still waiting on Far Cry 4 (enjoyed the gameplay/openworld of the last one), The Evil Within and Sunset Overdrive to see what they have to offer.
As of today (haha, it changes daily); SoM, Destiny, DKCTF, Wolf, MK8. In that order.
SoM take the top spot because the Nemesis system is so damn engaging. I like to make up my own narratives so it is right up my alley. This is another reason I enjoy Destiny, I like making my own story and filling in the blanks myself, so the lack of narrative that bothered quite a few was a non-issue for me.
That's another thing about SoM for me that is key, they were able to simultaneously let the player form their own story as they progress while also telling their own. An impressive feat.