It's not surprising that rock is on the top of the list. After all look at all of the baby boomers that were raised on rock. Add in the fact that there are many different types of rock such as 50s early Chuck Barry style, 60s gave us surf rock, acid rock, psychedelic rock, hard rock, soft rock. The 70s was a mix of all kinds of rock including metal. The 80s hair bands brought us more guitar screaming rock, speed metal, grunge and the list goes on. I love the old classic rock, but after 40-50 years of hearing the same old stuff, I've been acclimated to electric blues which a lot of it sounds like rock, with a new beat and lyrics.