There is not a lot that keeps me glued to the radio as I used to be.
I'm not a jazz singer.
A lot of what I have always done is do other singers.
I listened to classical guitar and Spanish guitar, as well as jazz guitar players, rock and roll and blues. All of it. I did the same thing with my voice.
The short answer is, yes, I think I have become a better singer.
I felt that, in retrospect, there was a time in the late Seventies, after I had a string of hits and successes, as a performer and a recording artist, that I wasn't saying anything.