For the most part, it has been fun, challenging and rewarding.
I recently joined the Rat covenant and started my tenure defending the place from would-be adventurers. I have taken my share of serious beat-downs from the combo of traps, npcs and human defenders of the covenant.
I know it's a pain in the butt: I'm talking about the arduous trek into the Doors of Pharros and the pvp ganking that it usually entails.