You definitely have pick the right rock blend to make it work and then you need personality not necessarily celebrity. Back in the day, WNEW jocks actually picked their own music and each had their own delivery. Rock music was blended. You heard Eagles along with Kiss. Jackson Brown along with Joe Jackson, Joni Mitchell along with The Pretenders etc., all on the same station. It has to be done right and with talented ears. No one takes the time to really listen and segue the songs that work well together. It can be done. Takes time. That's the problem IMO.