A surreal self portrait showing a special moment while painting in my tower when it suddenly gets apparent that my eye pieces need better adjustment...

I had this picture in my head for a while before starting and tried a new approach (for me) of making a base mesh in Maya and then taking it into Zbrush for detailing and painting, and in this case also rendering and tweaking.
It is one of my biggest successes so far of creating an image from my head, but still I'm not completely satisfied with the overall quality. Especially I feel there's a level of detail I haven't tapped into yet, and also I think there could be a better sense of depth.
Comments on how to improve any of that, and anything else, is greatly appreciated!!