I'm a bit keen on combining the human form with trees and plant life.
I have never made anything to this calibre, it is wonderful.
I have resteemed your contest too.
I also came across this one. The theme is tree, I thought you might be interested. It looks like it is in its early days, and could use a boost and also presents pretty good odds for a win. I'm not associated with it at all, I just like to support new ideas, and I love creative contests.
https://steemit.com/contest/@sparkyez/winners-of-sketch-drawing-contest-5-and-new-theme-for-sketch-drawing-contest-6