Yes, NormS, you know very well that I'm planning to make his hand into a claw. That'll definitely add some character, and banish any thought that it's a human in there, while distinguishing my character from any other arm-cannon character. I'm having a heck of a time though.
AdamAtomic: you said I'm shading-less. I guess I've worked on it a little since then, but as I said initially, I'm lost on where to start for something like this. Tips? Anyone else? I tried various outline styles early on, but none seemed to work.