Using an interview and questionnaire format, 358 driving under the influence of alcohol (DUI) first offenders and 141 DUI multiple offenders were compared on measures of personality traits, drinking behavior and problems, and driving behavior and history. In addition, official driving records for the two groups were compared. Results indicated that multiple offenders were significantly higher in hostility, sensation seeking, psychopathic deviance, mania, and depression than first offenders. Multiple offenders were significantly lower in emotional adjustment and assertiveness. Multiple offenders had significantly more nontraffic arrests, accidents, and traffic tickets than first offenders. They also consumed significantly more alcohol, evidenced more alcohol problems, and had higher BACs at the time of arrest than first offenders. Results are discussed in terms of general problem behavior and implications for intervention and treatment.