Cod 4: great and original.
Cod 5: shit rip off of cod4. flamethrower and ray gun are novelties and wear off. zombie mode is pretty gd.
Socom: not played yet and not sure if i want to, ill have to wait and see.
MGS4: agreed the offline cant be beat. online is deffinately better than most games (cod 5 etc) but i can see it gettin old.
GTA4: without a doubt the best social game going. sure the actual online game modes were shit but who needs them when u have free roam.
overall - someone needs to give the top dogs of the gaming industry a kick in the nuts and tell them to stop being retards, and get real and non retarded gamers involved in the development of their games.
ps. completely personal opinions and most are not fact based.