I chose COD4. Here is why.
1. This is where I was introduced to the franchise. I never played 1, 2, 3, or COD:MW3 so I can't vote for any of them.
2. Dat ****en Sniper Level.
3. Most simple online multiplayer of the games I've played.
4. It was the reason I bought a PS3 and it was really my introduction back into video games after about a 6 year hiatus, so it's really nostalgic to me.
5. The online maps were by far the most balanced of any of the ones I played in this series.
6. This map. I ****ing owned on this map and I never played sniper.
The only other one that I would say I liked was MW2, but it was just a little too complicated and **** Favela. Meet me at Burgertown.