Originally Posted by Maccross

Some of these concepts are pretty interesting.
Some pictures naturally have mistakes in them (particulary those which feature human anathomy, where it's actually appliable) but I like the direction you are going for - eventually your works will lose this slight feeling of childness of doodles made in the math workbook.
I am glad you didn't gave up on art and still improving.
The only concern - please, pretty please, work on your fonts more.