This study explores the three major consumer characteristics that underlie the use of Internet dating services: self-esteem, involvement in romantic relationships, and sociability. A significant three-way interaction effect among these factors emerged. Among sociable people, individuals with high self-esteem are more likely to use Internet dating services than are those with low self-esteem when they are highly involved in romantic relationships. The opposite pattern was revealed for sociable people, however, when they are less involved in romantic relationships. That is, individuals with low self-esteem used Internet dating services more often than did those with high self-esteem when romantic relationships were not important. The implications for academic researchers and practitioners are discussed.