Music for its own sake

We're collecting some new songs for the joy of listening. I feel that most of 60s and 70s songs seem more enjoyable. I'm not an expert but to me, style and voice of each singer was quit distinguishable from one another while these days many styles and especially voices seem the same. The fast pace of improvement in this area doesn't feel that impressive compared to the past and I think the real reason of putting a lot of sexy scenes in music videos of SOME songs ( I am trying to be fair :) ) is related to this fact. It means they have to make out lack of vocal quality by distracting the audience with some chocolate bars named sexuality.