I've been hearing a lot about how great & dynamic the Campaign is. But I haven't heard much about the co-op. Is it as crazy and unpredictable as the Campaign? Long story short, I need to decide between getting the 360 version or the PC version. If I got the 360 version, I'd be able to play co-op with a couple friends. If I got it on PC, the game would run and look better, but probably only play with 1 other friend (if he even gets the PC version). Is the co-op experience even worth basing my purchase choice off of? I haven't even mentioned how little my 2 friends and I even play together right now. We're always too busy. I hate people. They're the worst.