A lot of people have been talking about MW2 recently, but when I think back on previous COD games, I have the best memories from BO1. Maybe it was because it was the one I was the best at. My K/D in that game was almost double my K/D in any other COD. I loved the maps too, particularly Grid, WMD, Firing Range, and Summit. It probably also had best SMG's (dat rapid fire MPL). BO2 is alright, but I have a hard time believing its made by the same team that made BO1. Ah well, Good times. Discuss.
Boring. Poor Gun Balance. Poor Perk Balance. Terrible Lag. Boring. Terrible Hit Detection. Introduced Lag Comp. Introduced hardcore dark corner camping with stealth perks. 2nd Chance Did I mention it was boring?
I knew FMGs would be OP before the game came out: http://www.gamefaqs.com/boards/995751-call-of-duty-modern-warfare-3/59204323