how do you define bad musical taste?

first thing that came to mind when I saw the thread title was, "someone who doesn't like black sabbath."

I'd say if you enjoy the musical stylings of Nickleback then you are beyond hope.

I don't think it's so much the things you like but why you like them and how you express this liking
e.g.
National Review's Top 50 Conservative Rock Songs

though certain acts lend themselves to and encourage being appreciated in an ugly way (ha! nickleback!)

do you people pay attention??