Sorry, this came off a little nastier than I intended and the edit window’s expired. Allow me to clarify.
I get the feeling that LOUNE is, like myself, primarily a FPS gamer. Shooter games, in particular, are driven in a large part by multiplayer communities. Call of Duty (all of them,) Team Fortress 2, every half-life modification ever made, Tribes, Soul Calibur, Starcraft, Gears of War, Warcraft 3, Diablo II, Halo, Worms, Tekken and Hellgate: London are all examples of games who exist primarily to provide an excellent muliplayer experience. Sure, there are also well-scripted singleplayer storylines to accompany these titles, but they’re more of a secondary feature than the primary draw. You could probably toss the Command and Conquer franchise in there too. It’s just too long of a list to even formulate - the list of games without multiplayer would be much, much shorter.
The most popular games in the world are all multiplayer.
In fact, I’d say the only games where multiplayer isn’t at least a significant portion of the gameplay are RPGs. Playing online affords unlimited replay value, a strategic depth the most advanced AI can’t hold a candle to, and the infinite satisfaction of knowing that nasty headshot really ruined somebody’s night.
Look, there’s nothing wrong with single-player gaming. But to claim that the online portion of many, if not most, games isn’t the main draw is just completely untrue.
ETA: Ah, yes. You’re a console gamer. Of course you aren’t going have played online for most of your career. The PC online gaming community has been thriving for years - and look at the rate at which XBL proliferated.