Vehicle's have alwayed been OP. Doesn't matter the game.
"Tank beats ghost, tank beats hunter, Tank beats everything!"
But ofcourse you could knock a tank out with a nicely placed grenade or C4 pack.
Very powerful, but very weak. Depends on how good you are.
Never played Blops, wasn't going to get it unless I heard good things about it.
WaW was only purchased because everyone else was playing it for some time.
Got MW1 and 2, I liked the campaigns, but I dislike SP games. [Excluding Oblivion and hopefully Skyrim.] MP didn't ammuse me because of it's repition and small maps.
Hence, BF is godlike compared, from my view.