This biggest detail people seem to not notice is that people, like you, use minifig parts on larger creations. I've seen hands and whatnot but this is possibly the first I've seen the legs. Anyway, nice work. Great detail. Now all I need to do is build a mech. :p
Awesome. I love the color scheme, and the asymetry of the designs. I like the walker slightly more than the hardsuit, but that's just personal preferences, I'm glad I browsed today, they are both great.