i like the thinner line on #172. I like the angles better on #178. Can you get the stem to 1 line and maybe make the lobes wider (broader) on the bottom part of the leaf?
http://www.quesper.com/Projects_Student/Leaves/sycamore.gifsee attached picture of a Sycamore leaf. I think a wider base will help me feel like it represents a Sycamore better.