Update on the Big Brother, but I'm having trouble on the color scheme so I open to suggestions.
Hey man, sorry it took so long to comment on this. Hope I can still help. Over all, I dig the design. He looks like a mobile and versatile primary combat unit. Not the heavy hitter on a team, but he doesn't need to be. Good for spec-ops and light assault mission. The expanded hand, with the reverse magnetic field is neat. The sheath knife is cool too. My one issue with him is his knees look a little too far down on his legs. Not that a robot needs to anatomically correct. I love how big his head is. I think he can have short legs, just maybe consider making the joints proportional. As far as colors? Man, I always have a hard time with colors. The red highlights you have look good. I might continue that down his legs. The blue stripe down his face kind of eats up the details though. Maybe try a lighter blue? Or even the red, so it matches the rest of his highlights. I might go with a dark charcoal gray for his joints and belt. Maybe a lighter tone of that for the rest of his body. I would definitely think about making the highlights all a single color, and the rest darker or lighter. It will smooth out his appearance and make it easier for the eye to pick out the important details. I think once the rest of his hed is colored the stripe down his face won't look so heavy. Anyway, hope something in there helps. I'd love to see your next go at it.