In regards to #16, the previous feedback would be great to see:
"#16 is looking good, but we'd like it more if the blue S in the upper element had a slightly more "river" feel to it, maybe with subtle mountains behind, but within, the round element. Move the "sun" to the orange side, to the upper left, and the leaf to the right side. Thanks!"
And also, for the leaf, please try a five pronged, sharper leaf silhouette. Thanks again!