CoD4, I still play it on occassion whenever I need my fps fix. Addicting as hell!

Well I am loving Black Ops however World at War is still my favorite at the moment.  World at War was the very first Call of Duty that I bought and I love the historical part of it.  I also loved the multiplayer online.  However, the more I play Black Ops the more I am loving it.  I didn't vote but give me some more time with Black Ops and then I will vote.

Either Big Red One or Call of Duty 2.  I really did like the first MW game,  but they have gone downhill since.

Call of Juarez: Pre-modern Wild West-fare

Call of Juarez: West at War

Call of Juarez: Pre-modern Wild West-fare 2

Call of Juarez: Bound in Blood Ops

easily World at War. you get to shoot nazi zombies in the face. :P

Easy Cod4. Black ops is good aswell and the Zombie mode adds it up a bit. Imagine Cod4 with Zombie mode not that would have been nice.

MW. My favorite FPS single campaign experience.

I'm interested by the fact that there are no votes for MW2 at all, and I love to see CoD4 winning handily.

I haven't played a huge amount of Black Ops yet.

But I highly doubt that it will reach the enormous heights of CoD4.

CoD4: Modern Warfare, for sure.

As an aside, lol at MW2 having 0 votes.

Call of Duty: Big Red One.

It was my first touch with the CoD franchise and honestly it was the one I enjoyed the most in single player campaign.

Haven't played Black Ops yet though, neither did I with any previous CoD to Big Red One.