This MOC looks pretty good. I think the color scheme is good, the build looks solid, and his visual aesthetic is excellent. Also I like the fabric present. I don't see that many MOCs using fabric for extras.
My only complaints are very few. It's probably just me, but the MOC when seen from further away looks a little too busy. But again, that's probably just me so it don't take it too seriously. Second thing is that I feel the green easily overshadowed by the black and bold. But is that really a bad thing? We don't want to clutter up the color scheme. Again, don't take that too seriously (considering I cannot make up my mind).