I did't expect to enjoy its multiplayer as much as I do. I booted it up after completing singleplayer out of due dilligence more than anything. Played Survivor, and didn't stop playing all afternoon. Loving it! First *one life per round* mode I ever enjoyed, and damn do I enjoy it. The Last of Us seems to become my introduction to Counterstrikesque multiplayer.
I'd highly recommend giving it a proper shot. Once one gets past the learning curve with the scavening and crafting and listening, it will become very exciting - at least if you've got the patience for such a thing. Hell - even if I crap out at the beginning of a round, it still has good flow to it, and spectating is high tension entertainment for me. Try it man!