Same for me. There is moments I want to relax by growing my character and enjoying social interaction talking/exploring/hunting with guild mates and friends without being interrupted by some PKer.
Then there is time I like to get in to PvP action. But I don't like to be forced into it if I'm not in the mood for it.
But apparently the new Karma system in last version on BDO is punishing enough as to prevent numerous random PKing. So that's fine by me.