While OCD and OCPD share similar characteristics, such as an intense preoccupation with details and rules, they differ in important ways. Individuals with OCPD do not have unwanted thoughts that compel them to create routines or rituals, as do those with OCD. People with OCD have insight or are aware that these unwanted thoughts are unreasonable. In contrast, people with OCPD view their thoughts and behavior as reasonable and feel comfortable with their self-imposed systems of rules.