One of the cool aspects of all the social websites, even Vox, is the picture or icon you can upload to represent you. There are many creative people out there that have done a lot of creative icons.
A simple icon you can do yourself is a South Park character. Just go HERE to create and save your own. It gives you many options to get your character to resemble you. I have created one and afterword added my logo's to the characters t-shirt. Check them out.