For generations, the folk wisdom on love has split into two camps. One says birds of a feather flock together. In other words, find someone like you, and harmony follows. The other says opposites attract. Relationship science has mostly sided with the first camp. On average, people do pair up with partners who resemble them in background, values and outlook.

But a new cross-cultural study published in the Journal of Research in Personality suggests both camps have been asking a slightly wrong question. On the traits that matter most, the happiest relationships don’t hinge on how similar two people are. They hinge on something more lopsided, and more generous .

A Question Asked To People In Relationships In 74 Countries

The study takes up a long-running tension in the field: does a good relationship come from seeing your partner as your equal, or from seeing them through rose-tinted glasses? To find out, it drew on 41,606 people across 74 countries, comparing how they rated themselves with how they rated their partners.

Rather than treat every trait the same way, the analysis sorted them by kind. Some are what psychologists call valence traits, qualities nearly everyone agrees are good to have, like kindness and physical attractiveness. Others are value-based, like political orientation, where there is no universal “better,” only different.

That distinction turned out to be the whole story.

The Admiration Effect In Relationships

On universally valued traits, being equal was not the sweet spot. Relationship quality peaked when people rated their partner above themselves. Not as good as them, but better.

I call this the admiration effect: a firmly held conviction that the person across the dinner table is kinder and more attractive than you are.

It sounds like a recipe for insecurity, but the data point the other way. Picture the partner who, after a long week, still marvels at how patient their spouse is with the kids, patience they’re sure they lack themselves. That isn’t self-criticism. It’s a kind of standing gratitude, and it colors how every small moment between them gets read.

The finding fits a well-established idea in relationship science called positive illusions. Satisfied partners tend to see each other in a slightly more flattering light than an outside observer would. Those generous views aren’t just a byproduct of happiness and may help sustain it.

One proposed reason is the “Michelangelo phenomenon,” which describes to how people tend to grow toward their own ideal self when a partner sees it in them and encourages it.

Where Similarity Still Rules Relationships

The study has a second half, and it keeps the admiration effect honest. On value-based traits such as political orientation, the pattern flipped. There, perceived similarity was what mattered, and any gap between partners tended to come with lower satisfaction.

That makes intuitive sense. Believing your partner is kinder than you costs you nothing and gives them a great deal. But nobody feels warmed by the idea that their partner’s politics are “better” than their own. A difference in values reads as distance, not as something to look up to.

So the formula isn’t “admire everything” or “match on everything.” It’s closer to this: admire who they are, and share what you believe .

A Relationship Pattern That Crosses Borders

What makes the finding notable is how far it traveled. Differences between men and women were minimal. The effects held across cultures and appeared stronger in more modernized societies, especially the benefit of idealizing a partner’s kindness and attractiveness.

One plausible reading is that as partnerships shift from practical arrangements toward emotional ones, how you see your partner carries more weight. That interpretation is still an open question, not a settled fact.

As with any survey-based study, the results capture an association, not proof of cause. Happy couples may admire each other more because they’re happy, just as plausibly as the other way around. Still, the consistency of the pattern across dozens of countries is hard to wave away.

What This Means For Your Relationship

The lesson isn’t to manufacture a fantasy. Idealization that ignores real problems, like dishonesty or mistreatment, isn’t admiration; it’s denial. The admiration effect works on the good that’s genuinely there.

That means noticing it, and saying it out loud. People register a partner’s irritations more readily than their virtues, so the running tally in most relationships tilts the wrong way by default. A simple, “You handled that with so much more grace than I would have,” helps balance it.

Perhaps the defining quality of a happy relationship, then, isn’t compatibility or chemistry. It’s being willing to look at someone you know very well, flaws and all, and still believe, a little, that you got the better end of the deal.

Wondering whether you see your partner through rose-tinted glasses? Find out how your relationship really measures up with this science-backed test: Relationship Satisfaction Scale