I have a good dozen or so of friends that play CSS, and like MLL said, playing games with your friends makes the experience SO much better. And I don't see the point of getting COD on my PC when I can play it on a console. :/ Plus, all my friends play that specific game and other popular ones on consoles, not the PC.
Honestly though, regarding the part of your post how you said, "modern warfare shooter," I have no problem playing older games. I still play Delta Force Land Warrior online, CONSTANTLY.