Why is it that when people play music on the bus it's allways rubbish music?

I hate it when a big black guy (not being racist, but I travel on Llondon busses all the time and it's never white and rearly asian people) gets on with his phone blearing out horrible music (blimey I feel old!!). I wouldn't mind if it was good music. even if it where music that I personally didn't like, but I could tell that it was good in it's own right, I wouldn't mind! And you can't say anything as they are likely to stab you!