You're first pic, Epic!

You're OG. ;D

Nice

Now here is something nice here I do however think there should be more "SHINE" and "GLARE" to it since there is some metal type of concept here, maybe even adding some backround to it.

~~THINGS TO IMPROVE ON~~
Some backrounds and shine needed in this one.

~X~

Nice work on the details.

Again...

Love all the details you put into these robot designs. This particular design is actually kinda creepy looking.

Looove it.