What determines how we perceive different types of music?

[calieigh]

Music can bring out such strong and mixed emotions from every listener. A listener also appreciates certain music over other. A listener will find some music to be horribly and some music to be great. What determines a listener to perceived a piece of music to be a great work of art? What determines a listener to perceive a piece of music to have no beauty?

It seems music has to be structured right in order for a listener to appreciate it. A music with wrong structure, whether is be bad rhythm or bad placement of noted, becomes a burden to listen to. What in our minds determines the structure that music has to have in order to be appreciated? Please explain why.