It is well known that some songs are better than others, but it is not so easy to define why. A collection of songs is not just a collection of melodies, rhythms, instruments, lyrics, harmonies, and other sounds that make it up, but also a combination of features that together make the songs what they are.
- Rock
- Hip hop music
- Pop music
- Popular music
- Jazz
- Country music
- Rhythm and blues
- Blues
- Folk music
- Electronic dance music
- Heavy metal
- Soul music
- Punk rock
- Musical theatre
- Classical music
- Dance music
- Electronic music
- Funk
- Alternative rock
- Pop rock
- Singing
- Indie rock
- Disco
- Techno
- Gospel music
- Reggae
- House music
- Orchestra
- Grunge
- Instrumental
- Swing music
- Trance music
- Progressive rock
- Opera
- World music
- Hard rock
- New wave
- Ballad
- Psychedelic rock
- Christian music
- Music of Africa
- Contemporary R&B
- K-pop
- Country rock
- Blues rock
- Ambient music
- Ska
- Easy listening
- Hardcore punk
- Emo
- Dubstep.
