I have to say that to me, a good song is one that either blows me away with sheer brutality, themes, lyrics or the whole feel of it. Things that take skill. No fucking pig squeals or insane voice distortion. I like to understand what I am listening to. I love some happy, feel good songs like Smash Mouth's 'Astro Lounge' album, and I love some insanely brutal and depressing albums, like Gojira's 'The Way Of All Flesh', just for the issues it talks about.