are you using a cell phone camera or something? I cant understand why your images are so pixelated.
Btw, not bad on the drawings, try looking at some anatomy books maybe, and as arcan said, and as I have told to a few flowering artists. Yes...the legs should be about the same length as the torso and head combined, and the arms (hands included) shout come just over half way down the thighs. (look at the sig that I drew for example). As for the armor, I wont say anything particular, but keep in mind its functionality, its ability to move and its mechanical realism. If you look at mine youll see that the armor is very logical and would actually work as it is supposed to. At least thats my opinion.