Character Silhouettes

I don't usually work in silhouettes however I've been searching around for development inspiration and after seeing some really great silhouettes I thought I'd give it a try. 
After spending about 15 minutes on this first attempt I will give this approach another try.
The third and fifth poses have some potential, the rest will be scrapped. 
Great exercise. I will be collecting some more reference before I do the next set.