Mate choice and mate retention may both depend in part on the principle of homogamy, or positive assortative mating. In humans, the more similar couples are, the happier and more stable their relationships are. However, the practice of homogamy in mate selection must be balanced against the need to select qualities in a mate that are slightly different from one's own, and evolutionary theory has suggested that male dominance and female attractiveness are two particularly adaptive qualities that are sought in a mate. The present study investigated the relationship between marital satisfaction and homogamy in American, British, Chinese and Turkish couples. In addition, the present research assessed the evolutionary hypothesis that spousal ascendancies on dominance and attractiveness would relate to marital satisfaction. Cross-culturally, romantic love for ones spouse increased as a function of both homogamy and some evolutionarily predicted divergences on both dominance and attractiveness. However, marital satisfaction also benefited from some ascendancies that were contrary to the predictions of evolutionary theory, suggesting that self interest and cultural criteria may also guide preferences for spousal ascendancy. The present research provides for debate concerning the cross-cultural use of evolutionary hypotheses as predictors of marital satisfaction, while also suggesting unique cultural criteria for positive assortative mating.