Sadistic means that you enjoy taking part in cruelty.
I am pretty sure Joseph Stalin had sadistic personality disorder. He is a man who killed more people than Hitler, Pol Pot, Saddam and Genghis combined; and that's the low estimate. And unlike Hitler, Pol Pot, Saddam or Genghis, he didn't have a motive to kill all those people. Sounds sadistic to me.
could be depression, Avoidant Personality Disorder, Antisocial Personality Disorder, Schizoid Personality Disorder, Major Depressive Disorder, paranoid Personality Disorder, etc. . .
dependent personality disorder
Depends on which personality disorder you are talking about.
Dissocial personality disorder
Split personality disorder and multiple personality disorder are both old names. It is now referred to as dissociative identity disorder.
According to news reports and press releases she does not have Paranoid Personality Disorder, she has a Multi-Personality Disorder.
Some good movies and films for studying personality disorders are "Gone With the Wind" (narcissistic personality disorder), "Funny Girl" (narcissistic personality disorder), "Girl, Interrupted" (borderline personality disorder), "The Godfather" (antisocial personality disorder), and "Wall Street" (antisocial personality disorder).
Severe case of Borderline Personality Disorder
Emotionally Unstable Personality Disorder known as BORDERLINE PERSONALITY DISORDER
There isn't a crusader personality disorder. However, someone with a family member a personality disorder often feels like a crusader in protecting their family.
Psychopathy, Antisocial Personality Disorder, Asocial Personality Disorder, Narcissistic Personality Disorder and Borderline Personality Disorder are probably the closest. Some sources do not differentiate among some of these and sociopathy.