That whole "opposites attract" thing? Pretty much a myth, at least on dating sites.

A new study out of the University of California, Berkeley has determined that people on online dating sites are drawn to each other based on a similar level of attractiveness and social desirability.

In other words, if you're popular, other popular people will flock to you. And if you're not, well, you'll have more dating success by setting your sights a little lower.

Researchers who conducted the study said, "Individuals on the dating market will assess their own self-worth and select partners whose social desirability approximately equals their own ... The most striking prediction is that undesirable individuals will choose undesirable partners."

A follow-up study of more than a million users yielded similar results, finding that potential mates tend to stick to someone in their own league.

[Village Voice]