The feeling that my rp actions (as individual character and/or unofficial faction) has no influence on the global story
The feeling that the rp background is not coherent and consistent (for instance, a few very active newcomers may create a new group from nothing that will gain almost the same power than the established Houses)
The mix of two players communities (i.e. PvP and RP) that have diverging objectives
The inappropriate behavior of some players (lack of respect, will to win AGAINST other players, rude, etc.) causing frustration and drama