pretty much finished colored version.

What, really? You pixel in grey, then color later? I . . . don't think I've seen anyone do that unless of course they're just mapping a color ramp over the palette.
How are you going about doing this?
Did you do this with either the earlier done girl or crow?
Very curious. You're one of the faster pixellers I know of so I'd like to know more if you feel like sharing.
Well making grayscale first and adding color later is much slower. It doesn't really make sense from the efficiency.
How I do it... I just put the color on top of it.
Both, crow and girl used that process.
Since the designs are really complex this take long, but it saves me a lot of headache in the process, which I would have if I'd go with pure color first.
I'm a little surprised to see reflective chrome-like surfaces on him. They look cool, though.
Polished metal seems a little out of place, to me, because I guess I was assuming this guy to be more of a grungier, industrial type.
But some flashy, showier parts is interesting because it implies these guys have pride in what they do and so they keep their exoskeletons nice looking. Like a soldier that obsessively clean and polishes his gun/gear.
not much chrome, aside from the exhaust pipes, the shining parts are copper. I have there also brass, iron steel and some other textures, I also actually wanted to find out how much variety I can achieve with something which consists just out of various types of metal. Guess it looks interesting enough.
The copper parts are clean, while the iron is old and rough and the rust was brushed off.
You decreased the diameter of the upper arm pieces. Are you sure there's enough space inside for a man's upper arm?
Even the overlaid figure GIF you made doesn't appear to fit.
Even at a glance, the upper arms' armor seems much too small.
I can only imagine a rather tough looking guy wearing the suit, and therefore I'd expect him to be rather muscular.
I know he'd have the engine-assisted hydraulics and all that, but still.
Increased that significantly. ALso was much easier to see with color.
What would a guy be wearing, inside the suit?
When he takes it off, after battle, what does he have on? Would it be something like a pair of long-johns?
something like that, some parts will be padded with cloth and leather. Inside the armor it will be pretty hot, outside the.
For the back foot, raise the heel up like you did in the figure sketch, you could do a bit more to show the top plane of the foot instead of the front plane. Also the scale of the back leg might be a little off; it's not far enough back in space to be that much smaller than the front.
actually I rechecked it and made the foot a bit bigger.
Actually regarding to the concept the foot don't has a rolling movent, the front part always sits on the ground and there are pistons which will move the sole, in this position the upper copper plates will overlap.
Despite that I think it's looking better and more natural now.
Really great rendering as usual. I do think the weight of the figure is still off. The left leg is occupying space on the same plane as the right side of the body while the left side mass is beyond that. Nothing is supporting the left side of the body. Additionally the big metal shield is pushing the overall center of gravity to the left.
fixed that a little bit. The left vanishing point also was moved a bit more to the right since the first pencil version. Regarding the grid it looks somewhat ok, the legs could be spread wider but also would cause problems with pixel perfec tlines then, I am a bit limited on snapped angles.