I hear this all the time. "I only listen to metal" or "I like country music" or rock, or top 40 or whatever they're into. Whatever was popular when they were 20. Rarely do they broaden their horizons and listen to other types and genres. Me on the other hand, I like music. I'll listen to anything thats good. From 1920s jazz, to techno to gangsta rap from the 90s, to classical, salsa, big band, smooth jazz, 80s.... all of this is good and enjoyable.

Idk why more people don't try new music once in a while. I get bored of the same old thing. As long as it's got an interesting rhythm or melody structure i like it. That being said there is bad music out there. Modern pop country is awful. A lot of modern pop is awful. They rely too heavily on "witty" lyrics but the overall musical structure is weak and bland.