Formula of hit songs
BBC has a series of documentary called "Seven Ages of Rock" It is an overview of rock music scene from 1963 to 2007. Watching this program probably makes you analytical and I suddenly had a view of the formula of hit songs.
#1 comfort of similarity to ordinary life
#2 represented realization of inner desire
#3 sympathy for your existence and inner feeling of isolation, alienation, and frustration in life
When life filled with uncertainity #2 looks attractive. This can be broken down to...
#2A miraculous glamorous life
#2B destructive thug life
Here are some examples (sorry about old references) :
#1: John Denver, Bananarama
#2A: Motley Crue
#2B: many gangsta raps
#3: Metallica, Nirvarna
Now I am wondering same formula can be used to make hit content in other type of media....