yours look great! I don't think thes have a name, tho. One thing I notice on yours, Starlings, and most of them, is that the neck/chin deliniation is weak or missing. Try using a slightly darker color on the neck, or adding a gradient so the area just under the chin appears shadowed, as real necks do.
You'll get more control if you add some raster layers above your avatar and add some brush painting for color gradations on the nose, neck, eyelids, rosy cheeks, lip and haird highlights, etc. I even used a round brush on Scatter to add freckles to mine!
SELLING MY SIGMA NIKON F 10-20mm f/4-5.6 ULTRA WIDE-ANGLE LENS