I think my K/D for MW3 is somewhere around 1.00? All I know is I use the Riot shield and go possitive with it near every game. (No using tac-knife or C4 or switching to a second gun. Just straight up Riot shield...)
BO2 is at 0.85 right now on my main acc...(just fouced on lv at first not kd) on my 2nd acc its about 1.30 and im not sure what it is on the other call of dutys right now
For CoD4: MW it's low at 0.68, WaW is 0.57, MW2 is at 0.74, BO1 is at .98, and MW3 is 1.09. I have not done Black Ops 2 nor do I want to. I found Infinity Ward games better for Online.