No two people are alike. Even subjects suffering from the same personality disorder can be worlds apart as far as their backgrounds, actual conduct, inner world, character, social interactions, and temperament go.

Are all personality disorders the outcomes of frustrated narcissism?

What constitutes normal behavior? Who is normal?

The DSM does not provide a clear "threshold" or "critical mass" beyond which the subject should be considered mentally ill.

Laymen often confuse and confute "personality" with "character" and "temperament".