For me it's the inherent unbalanced nature of the pvp set up. Every weapon feels like a one hit kill weapon. Or that's just my perception. And honestly I don't like it for reasons I can't explain. I'm sorry if that's vague. It just doesn't appeal to me. Now that said the few times I have played it (I've played more in the last month or two than I did all of year one.) I had a few matches enjoyed. The that one sticks out in my mind was a match in which every one seemed to be using either hand canons, sans TLW and thorn, or scout rifles. I dunno it's just not for me. And this is coming from someone who played a ton of Halo and Battlefield. I usually enjoy shooters with objective based game types. Maybe my preferences are changing.