I freaking love COD4!! Online in Lvl37 last time I checked. Weapon of choice is probably the M4 Carbine or the MP5. Naturally playing with a sniper rifle takes a great degree of skill due to the fast paced nature of most of the game modes and it's not as easy without a mouse. Favourite moment may have to be whilst I was in the Last Stand mode, a player in the building above me was trying to shoot me through the wall but couldn't. He lined up for a better shot, but the same applies to me so for all of his wasted bullets, I picked him off with 1 shot to the head. Other magic moment was when in overtime in Search and Destroy, on the defense and the bomb was planted. Me and another teammate went to the site and he got picked off by the site camper. Being the Last Man Standing (and earning the reward for it) I threw a stun grenade and went around to killing him before defusing the bomb in time (earning the 'Hero' award). Love it, best multiplayer game I've ever played and the deepest with more weapons, camos and challenges to earn. Make sure to add me! My Live ID is Tuffty88.
Single player is incredible as well. Still playing through it on the first go and there's so many epic moments. If the success of the first Call Of Duty was responsible for the worn out WWII genre, I hope the next fad is creating moments in games that make you say 'HOLY SHIT' every 15 mins.