Throwing in my 2 cents
the First and Second were, in my opinion, the greatest in the series, with 4 coming up right behind it.
COD 3 was too.....like....corny, they tried to inject a storyline, now Im not saying thats a bad thing, just that the Medal of Honor Series did a better job with that.
Call of Duty 1 and 2 give off a feeling of Desperation, weither it be the mass assaults across Frozen Russian Cities or US Army Rangers being forced to retreat back to the beach head over the bodies of Friend and foe alike, trying to hold out for re-inforcements.
Call Of Duty is a Great Series overall.