You spin me right round....

Today I did a ton of sketches which I will scan in tomorrow am. But the quick and dirty vector version of what I am dealing with is below. Basically I am practicing drawing frontal, 3/4, side and all the hot mess of in betweens. I also quickly colored one of my sketches- it's a colored-in version of a low res crappy scan, but I wanted to get an idea to see if I should pursue this girl any further. Any thoughts?