They are nice, but DUUUUDEE..
STOP using lined leaftlet paper!!! You are ruining your art by doing that!!!!
Its really not that expensive to have pure white printing paper or something, just ANYTHING UP LINED PAPER!!!!!
I can't stress this enough, its like drawing decent/finished work on tissue paper, they wont last, that paper turns brown very easily, its thin and the surface holds little greylead.
Try some REALLLY nice visual art pad diary paper or illustration paper (best to use ink on these) but maaan..once you get better paper (and a dark B pencil) your work will stand out more. Really, you are using very shit stuff to make decent stuff, that overall lessons the durablity and quality of the outcome.
Also, experiment more, the world isnt ruled by greylead pencils
. try colour more.
anyway, as stated, should be in the concept art forum. But yes, good drawings, decent, abit pudgy in alot of areas with some anatomy off, but decent, you just need better tools and different mediums and media surfaces.