Wow, you really are the best technical/concept artist I've seen on here by far. You definitely rank up there with Jsun and MeganRid. I can't wait to see our new style, if it's even better than this, I'll probably have a coronary from the sheer awesomeness.
This model definitely brings to mind one of the mecha for my story, the ES-21 Sohlnir. Because it is along the same lines as how I envisioned the Sohlnir would look, mostly the faceplate and blocky body, a consistent theme in Earth Sphere Union mecha.
I definitely will be adding this to my favorites, as it show much of your raw skill in drawing, not to mention your mechanical knowledge.