I'm worried that I might end up only listening to music that sounds like music I already know, which is a route to ever-diminishing returns. I think if I want to have the chance of occasionally discovering something that really amazes me then I have to make sure to push myself to look for new things. Or, at least, they have to be new to me, which buying music that influenced people I like isn't, really, though buying 80-year-old classical music is probably OK. I realise this is probably all some weird Protestant work ethic applied to music appreciation.