I'm kinda speechless. I haven't seen such fast improvement outside of Conceptart.org, like ever.
The blond girl is really nice, but in a foreshortened shot like that, eventually you're gonna want to vary your line weight. Like, draw the closer parts sharper and bigger, and the further parts softer and smaller. Mainly smaller and bigger, though. Almost any blurring gives the sensation of huge distance (or, to a near-sighted person, about half a meter).