I've had my share of shooters in the past six months...but the one that gave me a thorough expirience was Crysis 2. Blastin' aliens with truly creepy fast moves was more than I came expectin'. I hardly even cared that the marketing lied about "damage physics"; which was completely absent from the game(not that I cared; it ain't Far Cry revolutionary or intended to be).
Battlefield 3's campaign was totally undersold and cut short by an abrupt and boring end. I can't say anything about the multiplayer, however...it's probably very good, but I spent too little time on it. Overall, the game is an achievement, topping the previous games by a whopping factor of realism/emulation of realism. The sounds are over the top but give it a distinct reality-sense.