Notbad at all
~~REVIEW~~
Hmm well i must say these are differant and nice sketches, i guess you are going with the black and white style, would be really nice with some "COLOR" in the mix though, its really nice and detailed, even a splash of color here and there wouldnt hurt, or instead of the sketches why not just add some sorta comic style so that you have it in frames somehow, its a good drawing and good detail, the black and white is cool but could be better with some color mixed in.
~~THINGS TO IMPROVE ON~~
Some suggestion of color, and even comic style would work on this