[url=http://www.roleplayerguild.com/topics/64661/posts/ooc]Wow, coincidence much? XD[/url]

I would shy away from open world personally. Because when left to their own devices, you usually get someone sitting in the corner hoping someone will come over and talk them. Or they all might do it at once XD

And you can go ahead and kill as many players as you like, but don't complain when you suddenly find yourself alone :P