Very nice! You have definately developed the basics of vector work nicely. You may want to work a little now on your anatomy, though, as the figures in the pictures have several errors that artists will pick up on immediately. Oh, and if you get the time, try and work in some more detail in areas that can benefit from it - i.e. the hair, etc. Take a peek over at
http://www.createblog.com/forums/lof...hp/t54322.html if you need a few techniques to get you started.