This is a term that is obviously subjective, there is never a definitive definition of what "Good Music" truly is, but people can agree what on what it could be. We set standards and benchmarks as to what can be considered "Good Music"
I'm no expert in what music is, but I can detect quality music when I hear it, I listen to all sorts of music, but I mainly like to listen to a lot of underground Hip-hop and good quality mainstreak hip-hop. I enjoy Aesop Rock, Atmosphere, Blueprint, k-os, MF Doom, Madvillian and the list can go on and on. Only recently though have I found, a flower of a song.