Who Defines Good Or Bad?

[Rad3n]

Imagine a horrible song that everyone loves. Is it still a bad song if 99% of the world think it's great? Is it a good song if 49% of the world think it's great? If it's an awesome song and only 5 people like it in the entire world, is it a bad song?

I know that a lot of these threads come down to people's personal definitions. Who decides what's good or bad? Is it the general consensus or is it something else. I'm selfish in this way. I don't care if the whole world loves it, if I see it as a bad song ( for whatever reason ), it therefore is a bad song. ( Not to say I don't usually confer with others at some point ).

Here's something to stimulate your thinking; A long time ago everyone thought the world was flat. Only those who'd seen the world and knew it to be round believed it to be round.

If only a select few have seen what great music is, are they right to say what's good and what's bad? (this isn't to say I think my taste in music is ultimate)

Who defines what's good or bad music? Good or bad anything for that matter?