You don't have to welcome every new idea with open arms, just be willing to accept that the way you see things could change and grow. Well, not entirely, but discard the idea that a thing has to be really underground to be legitimate. That pretty much sums it up. Become a more discriminating person. While you're breaking down and admitting you can appreciate a really good movie or a major label album, also try to realize that not everything that is independent is good.
Nothing is good all the time.
Most stuff is lame, period, no matter who puts it out. I haven't always been able to follow this one. But I do my best. But try to do new things as often as you can. Go exploring by yourself.