Personality Disorders come under the hierarchy of mental disorders alongside Bipolar Disorders or mood disorders, or neurocognitive disorders. This disorder incudes long term thoughts and feelings which result in unhealthy and inconsistent behaviour of a person, also called as maladaptive pattern of behaviour. Personality is defined as a set of thoughts, feelings, personal behaviour and mental traits that distinguish an individual from one another. How people with personality disorders behave? Diagnostic and statistical manual of mental disorders, fifth edition (DSM-5) lists these personality disorders in the same list as other mental disorders. Solution Personality Disorders come under the hierarchy of mental disorders alongside Bipolar Disorders or mood disorders, or neurocognitive disorders. This disorder incudes long term thoughts and feelings which result in unhealthy and inconsistent behaviour of a person, also called as maladaptive pattern of behaviour. Personality is defined as a set of thoughts, feelings, personal behaviour and mental traits that distinguish an individual from one another. How people with personality disorders behave? Diagnostic and statistical manual of mental disorders, fifth edition (DSM-5) lists these personality disorders in the same list as other mental disorders..