Personality problems and pattern ordered by difficulty to change according to Seligman:

• Panic - Curable

• Specific Phobias - Almost Curable

• Sexual Dysfunctions - Marked Relief

• Social Phobia - Moderate Relief

• Agoraphobia - Moderate Relief

• Depression - Moderate Relief

• Sex Role - Moderate Change

• Obsessive-Compulsive Disorder - Moderate/Mild Relief

• Sexual Preferences - Moderate/Mild Cange [*]

• Anger - Mild/Moderate Relief

• Everyday Anxiety - Mild/Moderate Relief

• Alcohol Dependency - Mild Relief

• Overweight - Temporary Change

• Post-Traumatic Stress Disorder (PTSD) - Marginal Relief [except for rape which shows Moderate Relief]

• Sexual Orientation - Probably Unchangeable [*]

• Sexual Identity - Unchangeable [*]

From 'What You Can Change and What You Can't*' by Seligman pg. 244 of the reviewed ('vintage') edition of 2006, explicitly confirmed to be still state of the art.

Just read the book and thought this table to be quite quote-worthy even though it isn't prosaic.

* These terms have specific and possibly somewhat non-standard definitions in the book. Seligman gives a convincing theory for formation of aspects of sexuality of different 'depth' (a core concept of Seligman) based on biological facts around expression of genes and hormones. See chapter 11.