What constitutes a good song? Is it a slammin’ beat, great melodies, lyrics that you can connect with, or no lyrics at all? Does it have real or synthesized instruments? Is it an epic tune at 8-13 minutes, or the standard radio length of about 3 1/2? Does it have to be by a band or performer that you like? Can it be from a genre that you despise?
Music like many other forms of art is completely subjective, and a song that one person might love, could sound like nails on a chalkboard to another. Sometimes a song that you once loved can be overplayed, leading to a level of disdain toward it; only to become a favourite again in ten years when you hear it at a party or bar.
Songs are as individual as the people listening, which is what makes music in general so unbelievably fantastic. The feelings or memories that a certain song can invoke are what connects us to the music on an emotional level. There really is no right or wrong answer to what constitutes a good song. Unless it’s country… then it’s just awful.