My mom (86 years old) says all rock music sounds the same - loud.
When I was a teenager, I would be listening to music in my room, even at a very low level. My mom would come into my room, realize the music was on, and say "it's too loud, I can hear it".

Of course, she loved orchestral music, even though sometimes it was louder than rock music (when experienced live).
That's generational.
But a lot of the pop music I hear sounds very similar; alt-rock sounds very similar; rap (even though it has changed over the years) sounds very similar at any moment in time. That's why I enjoy exploring places like SoundCloud to find music that doesn't fit the mainstream mentality.