I have to say Halo series followed closely by Elder Scrolls.
It's between Halo, Call of Duty and Arkham for me.
I would have chosen Assassin's Creed but I honestly don't trust this upcoming game :(
I'd take Halo over Call of Duty. So it's actually between Arkham and Halo. I can't really comment. Halo still has 5 and 6 to go and I'm really looking forward to Arkham Origins. Both are totally different games too.
Final Fantasy; classic series that dates back to the NES that's stood the test of time, even though everything related to FF XIII and X-2 were complete dogshit. IV, VI, VII, Tactics and X were all masterpieces as far as RPGs are concerned, and I actually really enjoyed XII although I have no idea why the main character wasn't Ashe given the whole story literally centered around her and her kingdom. Loved the Arkham games, and I'm just too strapped for time to really get into Mass Effect although I've heard great things. After playing through The Last of Us, which is honestly the best video game I think anybody's made to date, I'm going to make it a point to pick up Uncharted.
Final Fantasy was ground breaking and the fact that we have so many of them tells something about the staying power but I really, really, really CAN'T believe that there is no mention of the Zelda or Mario series? This is classic stuff. Nothing could of come before those in the historic archives of gaming! Seriously how can you not have Mario or Zelda in your list??? I know there is an Other option but I'm just saying they deserve to be out of the Other category....sorry for the rant.