Emotional Demon Thumbnail

I have been experimenting with different shapes and sizes of my character to get an idea on what I want them to look like. I have done 20 different thumbnails ranging from big and bulky tank characters to thin, good-looking characters. Because I chose the emotional demon theme each of these characters share the stereotype of every typical demon character: horns, devilish tail and ogre-like ears, as well as a few other features which may be independent to just one thumbnail.