You can still socialize in multiplayer games. It'll be a very big difference in the people you chat with, but it's still possible. I've had some pretty good conversations and made some good friends playing co-op and multiplayer games on my Xbox 360.
I do agree that these games like FarmVille get tons of socialized gaming activity. I used to play FarmVille, but it got boring after a while, so I went back to play those "real" games.