There is a quality to what they do that makes it alive in a way that you're not liable to hear from many other performers.
I have to admit, that no matter how much I love the blues, there are times when some of the older styles of the music can get boring. After one or two songs there just isn't enough variety in either the music or the vocals to maintain my interest. I think, like any genre, unless the person performing has something unique they can bring to what...