I realize that I am about to speak in generalizations, and there's a chance the following may not apply to the specific recordings you are listening to, but the vast, VAST majority of the music you describe as being 90% of your listening is almost always compressed like crazy in the studio, and ends up with very limited dynamic range.. it's the desired nature of those genres, and what gives it a lot of it's punch, edge, and "grunge." There simply ISN'T much "sound dynamics" or dynamic range to most fast rock music.
Perhaps I'm misunderstanding what you're saying?