Ltns too, St0ven. I agree with St0ven there. Nemesis have told me the hue variation is important in getting an anime/capcom feel look. I can give you some anatomy on drawing robots such as mecha genre.
Legs:
*Legs will look better if the lower leg is longer than the upper.
*Make them big and strong.
*Add mechanical armor to them.
*Two types of legs: Long, Slender Type
Short Fat legs type
Arms:
*Use the arms of cranes and escalators as a reference.
*Arm Types: Cylindrical Type, Rectangular/Square type, muscular, etc.
Chest:
Types of Chests: Inverted Triangle Shaped,
Square shaped
Spherical shaped
Stand Shape (Parallagram shape)
Facial Features:
Eyes: Polygonal, Circular, Crescent, Rectangle, Goggles, and camera lens.
Mouth: Convex type (e.g. gundam type mouths) , flat type, and concave type mouth.
Head Design: Apply a beveled design to the overall face.
Hips: T-type (Shaped like a T) , Underwear Type, Underwear Type (With sides straight)
Shoulder Designs: Circular, Squarish, Belt and armor type, etc
I am a little tired to write more, I'll give more info on doing them later.