I can certainly add a few of things I've learned about Cluster B personality disorders.
Cluster B is called the dramatic, emotional, and erratic cluster.
Antisocial personality disorder: a pervasive pattern of disregard for and violation of the rights of others, lack of empathy, bloated self-image, manipulative and impulsive behavior.
Borderline personality disorder: pervasive pattern of instability in relationships, self-image, identity, behavior and affects often leading to self-harm and impulsivity.
Histrionic personality disorder: pervasive pattern of attention-seeking behavior and excessive emotions.
Narcissistic personality disorder: a pervasive pattern of grandiosity, need for admiration, and a lack of empathy.
Disorders in this cluster share problems with impulse control and emotional regulation.
Me: 45 W43 S7, Foster S9 (Planning to adopt post divorce) D mentioned Feb 2015, Wife served 3/24/2015. She moved out 4/15/2015.