It is a very difficult thing to judge. Although pvp is a very fun experience, It cannot provide the sustained enjoyment that pve does. Not to mention PvE makes you feel like a true badass. There's nothing like connecting a headshot on a fallen vandal and send him reeling backwards. Self satisfaction is certainly more prominent within PvE. Don't get me wrong though, sometimes PvP is the only thing that may satisfy my craving for destruction. The chaos and mayhem in PvP is great. It's a tough call, but PvE is much more fun, rewarding, in addition to yielding tangible results.