In CoD 4 I got stuck at only one point in the game and MW2 I noly gut stuck at a a couple of places, WaW I was having trouble the whole way through and I actually had to think about how I was going to do something, instead of just shooting and running...
Also, WaW had up to 4 player co-op campaign and zombies, which was good...
And WaW is more realistic than MW1/MW2. Guns had more recoil, maps were bigger, there were tanks on some maps, there was gore added and much more. That's probably why only a handful of people liked WaW. And, yes, the 4 player co-op was an excellent addition. WaW would be even better if IW didn't screw up CoD4 with those lame perks and gaymores, rpgs etc etc. TreyArch would never put that same crap in WaW.
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