Oh wow, I don't know if I could pick a favorite. I had his first nine albums and loved them all. Maybe his early greatest hits one would be a good place to start.
I remember a few years ago I was snooping around Peoria (his hometown) while hubby was at work trying to find his school and I stopped at a gift shop to ask about it. The clerk didn't even know who he was! I was shocked! I got lost and never did find it. Now they have a tribute concert for him every August. (Since his death )