Going back to Milly's question about building a repertoire - speaking as an amateur singer and (sorry to say) guitarist - I have always believed that you should choose songs that appeal to you and move you. You should have an interest in the meaning and/or history of the song and sing it from the heart, whether it be happy or sad. I do sing accompanied and unaccompanied and enjoy both and, luckily I am not the greatest guitarist in the world so I never play loud enough to drown out the song. Milly also asked about singers to look out for and personally I think that Mary Humphreys and Anahata have found some wonderful alternative tunes to popular songs and Pete Coe takes some beating with his song repertoire.
Yvonne