Approach and avoidance motivation may represent important explanatory constructs in understanding how individuals differ. Such constructs have primarily been assessed in self-reported terms, but there are limitations to self-reports of motivation. Accordingly, the present review concentrates on the potential utility of implicit cognitive-behavioral probes of approach and avoidance motivation in modeling and understanding individual differences. The review summarizes multiple lines of research that have documented the utility of such probes to the personality-processing interface. Although multiple gaps in our knowledge exist, and are acknowledged, the value of such implicit cognitive-behavioral assessments is emphasized both in modeling multiple subcomponents of approach and avoidance motivation and in showing that such tendencies matter in ways that transcend momentary experiences or manipulations.