SummaryThe diagnosis of personality disorder is sometimes tolerated but often reviled as a label to attach to people we do not like. This is hardly surprising when we consider that problems in interpersonal relationships constitute the main feature of the disorder. But we cannot escape the fact that personality problems are extremely common and rejection on grounds of perceived undesirability is doltish. Both the DSM-5 (2013) alternative model and new ICD-11 classification of personality may help understanding as they are more in tune with science. Most of the previous classifications have failed to help practitioners or patients.Declaration of interestThe author was the chair of the ICD-11 Revision Group for the Classification of Personality Disorders of the World Health Organization between 2010 and 2017.