Freud's theory of libidinal types provides a minimal typology to help clinicians classify patients' mental structures and symptoms. The three main libidinal types are erotic, obsessional, and narcissistic. The erotic type prioritizes love and being loved. The obsessional type is dominated by the superego and fears conscience and dependence. The narcissistic type seeks to impress others and feel larger than life. These types can present alone or combined, and correlate with different neuroses when illness occurs. Freud's typology clarifies vast clinical data and orients diagnosis and treatment in the psychoanalytic clinic.