Wow, that sounds like a lot of stuff, and I personally have no idea what half of what you said even means. Good job!
Also, question, would you be willing to share a picture with the blender model for the character? I'm super curious about that.
Ooo looking good. You can easily mess around with some vertices to give him a little more dimension. There's an option in Blender to drag one vertex and have those in the vicinity follow proportionally. I found it does wonders for polishing a rough mesh. Also, in case you haven't done so already, using a reference image in the background is super useful for getting the proportions right with minimal effort.
