i would, without a doubt, say that left 4 dead is the single LEAST boring game I have EVER played. full stop.
That said, i cant imagine liking it if i didnt have a team of really awesome friends to play with.
That's the thing, the game itself is just... boring, lame. Sure, you could add friends, but then that means the friends are what make the game fun, not the game itself.
no way, its the heart-pounding, adrenaline flowing vs matches. the ones where the score is going back and forth and everytime you hear a boomer or hunter the whole team tightens up and your senses are on overdrive trying to cover as much ground as possible while checking every corner to prevent ambush...
or when you've got the other team on the ropes, one of them is incapped on the ground and youve got two hunters still up and a boomer about to spawn in 5 seconds... AGHHH
just thinking about it gets my blood pumping like crazy. nothing so exhilerating as beating a team thats maybe just a little better than yours but you've coordinated and executed a perfect attack and got a little random luck thrown in there too
still though, its a competitive team based game, if you dont have one then you arent really playing the same game