Well, the only real bonus to being on a PvP server is that its allways more exciting, though at many times extreamly annoying. However at lvl 70 in farming/questing areas, at least in my own experience, many times you get left alone by members of the other faction to avoid iritating conflicts while you both try to farm
I personally started on a PvP server, and avoided most questing areas where ganking is rampant, for example STV, and when I switched to a PvE server for a change the game just seemed to lose that exciting bit if entertainment in confliting areas.