Just to clarify, when you say Open World PvP, do you mean designated areas where people could PvP? Because that's NOT what Open World PvP means in a MMO.
Open World PvP means all planets and territories are open to PvP, you cannot unflag yourself, and thus you are on perpetual danger of fighting both mobs and enemies. Some people like it for the thrill. Good for them, I play MMOs to relax and am NOT looking for any PvP whatsoever.
So if I misinterpreted you I apologize, but your sentence "I like Open PvP in a PvE server" sounded odd, especially because it contradicted your following sentence about being griefed, which I fully support of course