I personally hate the expansion packs.
I’ve bought two for World at War and I think one for MW2 and I’ve noticed one thing.
They always come out right around the time that you’re sick of playing the game and or new/better competitor game is just around the corner.
Never buying one again.
Everybody was telling me to buy it for Black Ops whenever it came out recently and I didn’t. I haven’t really touched the game right around the same time (few weeks after) the expansion packs came out just because I’m sick of it at this point.