Once when I had been experimenting in first breaking into art I often scribbled very lightly and kept one thing in mind: Never fall in love with certain portions of the picture. Mentally, carving into your paper or making dark bold outlines before a finished product prematurly ends it and sometimes stifles your own creativity. become enveloped with your work but keep it open for revision as well.
I actually like your style. It has a great tone to it that honestly I'm glad to say doesn't look like every other person's I see. Consider the above mark in no way as critique but more so a suggestion.