If you're looking for depth and musical integrity in pop culture, you're looking in the wrong place. There's blues and folk in rock/pop radio fare, just like there's beef in a McDonalds hamburger -- in other words, not very much, and what is there is very predictable and not very satisfying. Occasionally the musicians run out ahead of the pop culture machine, and you get the good stuff played on pop radio; the creative rock'n'roll explosion of the 50's-60's is fondly remembered for this reason. But the machine eventually catches up and homogenizes the product. In fact, like other businesses, the pop music industry in recent years has gotten better at staying ahead of the musicians and maintaining a nice, predictable market share -- which just means that we have to go elsehwere for the good stuff. Fortunately, there's plenty of it out there.