I record only my original songs. I'm working on my 4th CD and have been quite successful so far in this endeavor. When I perform live, only about 2/3 of my set will be originals. I routinely include "covers" of traditional and contemporary songs that many in the audience recognize and can sing along with. Many audiences get tired of hearing one "new" song after another and they seem to zone out if that's all that is performed. IMO by mixing in songs that the audience has known for years, you are better able to keep them interested in your performance.

Mike