I have always liked having both, but it is not really a requirement for me. I liked the looting system the original asherons call had, you got to loot a random item or two off a guys corpse if you fried him in pvp. Having been on the receiving end of losing a couple prize pieces never spoiled the joy of looting others to me. But on the other hand imagine what wow would be like right now if the classes weren't constantly rebalanced to appease the 10% of players that do arena, likely a whole lot better game.