People from Denmark are called "Danes." Danes are typically defined as citizens of Denmark who speak the Danish language and possess Danish roots. Danish identity is based on a set of values that have been formed throughout the formation of Denmark.
Studies routinely show that people from Denmark are among the happiest in the world. This is most likely due to genetics, as countries that have close genetic ties to Denmark are ranked happier than other nations. Danish heritage has been linked to genes that have a strong influence on serotonin, the chemical in the brain that produces happy sensations.