People who like easy kills like MW2 because it takes less bullets (2/3 generally)
It also means people are more effect at camping - something I hate.
Black Ops took more skill to kill people, you had to be quick on the stick - which I like.
effectively, they are exactly the same mechanics, just different skins/maps.
BLOPS is better.
MW2 lovers are generally campers who love to sit in a corner, waiting for someone to run in front of them and shoot them in the back. Its not skillful, its not clever, its boring and the people who do it are scared of protecting their precious K/D ratios or shit themselves when a good ruck is going on.
On the whole, Battlefield is a world better. It promotes team play, not selfish divs who think they are Rambo.
The maps are better, each class ou choose has an actually purpose which can help your squad/team.
There are tatics which help and you have to think.
The reason COD is so popular is because people prefer to be selfish over the internet, so they run around like headless chickens (I do on COD) thinking they're awesomes
Both good games but now I've given BFBC2 a proper good play, I dont even think of putting the COD discs back into the machine.