@Nilazz: I went back to 4 recently on PC to play some FFA (The game mode that made me love Call of Duty back when it was just "Modern Warfare.") It's still awesome, even if the people I played with weren't very good (in my final match, I got first place, and used a pistol exclusively for the last half of the game...).
I got tired of COD after MW2. Played like 600+ hours
Same here. I had never played the original MW and I've played everything since MW2 except blops 2. None have compared to the time I spent with MW2.
That's pretty sad, Blops 2 is by far the most worth playing since the first Modern Warfare, if you ask me.