On some levels, I liked the Brothers Four back in the early 1960's. Yet, of all the widely popular folk groups of the period, I thought they seemed the most mechanical and rehearsed - more like a studio backup group in some way. They had some wonderful original (or semi-original) songs, but when they did more widely known material, it was too easy to see their interpretation as a little "stiff."

For the "Seven Daffodils" answer, there is another thread treating with that song.