Rock And Roll, british invasion, psychedelic, hard rock, disco, synth pop, metal, alternative, grunge...

Blues, Soul, Motown, Rap...

Traditional, folk, country, country pop, Americana...

Each genration has had their thing for a time that overtook what came before it. I am not sure that anything has really dominated music since grunge. Maybe rap and pop. But Pop music seems to have become unimaginative and all about production now. I am waiting for something new to arise.