I think I heard Raggle Taggle Gypsy by Planxty in about 1980. I must have heard a lot of folk songs before that, but that was the one that changed my life. I remember all that "Singing Together" at primary school in the 50s. Ones that stick in my mind from then are Westering Home, Sweet Polly Oliver, Bonnie Dundee, Oh No John, Dashing away With The Smoothing Iron - that sort of thing.