I would start with a better location...a MUCH better location.
not sure what you are doing for processing, but your colors and white balance change from picture to picture. did you desaturate some, and/or boost the contrast on others?
toss the one where she is standing on garbage. shadows are bad, colors washed out, and...well, shes standing on garbage.
the brick wall shot could be decent with some better posing, and some fill light. and a nicer brick wall.
the shot where she is laying on the old wood deck(?) might be better in color. the B&W isnt very tonally good.
the shots all have horrible backgrounds that could have benefited from some larger aperture bokeh to drown out some of their awfulness. the guy on the bridge might have been an OK shot if he wasn't staring at some UFO's.
I like the pose where she is laying on the ground...but again, the location is a deal breaker for me.
on a positive note...you have a very pretty model, so make use of her.