An interesting sub-thread emerging is the ease or difficulty of playing while singing.

In a different incarnation I found it difficult to play lead (electric) guitar while singing, but playing acoustic accompaniment I find more or less easy (although there are one or two songs I find I have to really concentrate on what I'm playing, which could potentially affect the singing adversely). If I do find it difficult, the solution for me is to come up with a simpler arrangement that I can manage easily.