My best times with the game were in a group of 3-6 buddies talking on Teamspeak or Mumble, roaming around and wreaking havoc. Most everyone plays that way, so if you go into it a loner, you're gonna get fucked.
While I can appreciate cooperative play, I'm one of those who likes to go it alone and not for lack of friends or an unwillingness to team up with internet strangers. I like the atmosphere that comes with feeling like it's just you against a world that's turned to shit.
I once prayed to god for a bike, but quickly found out he didnt work that way...so I stole a bike and prayed for his forgiveness.