People are interested in people like themselves. Women on eHarmony favor men who are similar not just in obvious ways — age, attractiveness, education, income — but also in less apparent ones, such as creativity. Even when eHarmony includes a quirky data point — like how many pictures are included in a user’s profile — women are more likely to message men similar to themselves. In fact, of the 102 traits in the data set, there was not one for which women were more likely to contact men with opposite traits.