Yes it does get frustrating and many staff get burned-out from the "personality disorder" clients. All clients need help, and you should not focus more energy on one client or type of client than another. The Personality disorder client (i.e. Borderline client) will demand all of your energy and the rest of the staff's energy to give them all attention, whether it be positive or negative. The reason it gets frustrating is that these clients do have an understanding on what they are doing, but like you said, they refuse to take "personal responsibility" for their actions. Other clients may not be able to express their needs to staff as well as other clients. This can be hard to determine which client needs more priority over another client during your shift. Gaining the experience comes within time. Try to ask other nurses, the treatment team, and the other staff at your facility for more insight on how to handle personality disorder clients better. You can also read up on this type of client in the DSM, the internet, other books, etc.