What kind of music melody let a person listen to feel particularly earthy?

Phoenix Legend, Phoenix Legend sang a lot of songs, now become a square dance essential background music, give a person a kind of hear this kind of song is the feeling of square dance, and now dancing square dance is basically big mother, so people hear the Phoenix Legend's these songs, may feel not quite in line with the scene, especially in some formal occasions, or coffee shop or something, feel that their songs may not be too formal, but the Phoenix Legend's songs may be too formal. I don't think their songs are very formal. Of course it's just that the songs are in different genres, or for different groups of people, and there's no bad opinion of these songs.