RE: My drawings
Very Very nice. Others have said it and I'll reinforce the fact that you have a skill, don't waste it!
Suggestions...these are my own opinions and they are only meant to be constructive. On the black-and-white pencil sketches are you using 'regular' pencils? If so pick up some softer 'art' pencils...look for "2B" or "6B", the higher the number the softer the lead and the darker you can get without making the paper shiny. Darker darks was always the first thing I tried to enhance once I had the basic piece done in High School.
Also, wherever you find those 'art' pencils look for some white charcoal pencils and some black paper...I always had fun that...its a whole different effect with which I was nearly always pleased!
Again, nice stuff!!!