I really don't have much experience writing songs but have been a "critic" for my lifetime. I realized I could pick out a quality song when I would listen to a new album and find B side songs written by great song writers regulardless of the artist or performance. I 'm not sure of what is required for a good song but apparently there are ingredients that stand out. That said, I agree that the beauty in a song is in the ear of the owner and thankfully they share those with the rest of us.