Furthermore, I often find it preferable to capture the atmosphere [if that's the right word] of a traditional tune by using the simple major, rather than the 7th, of the dominant-5th, as my dominant - not sure why that is; but if I am accomp'ing in D, will often prefer to use a 'D, G, A-major [rather than A7], D' sequence. Seems to me to give a 'folkier' tone that I can't quite analyse: perhaps the dom-7 gives something of an over-sophisticated tone, more redolent of pop than of folk, to an accompaniment?

Anyone any views on this wrinkle?