i just checked out the newest ellen portrait. i really like how the eyes and parts of the hair turned out, but at the same time, the style that makes the hair look good plays hell with the skin textures and shadowing. also, i agree that some of the basic anatomy on some of your works seems to be off by a tad, which wouldn't be so bad if the artwork weren't so darn realistic. i have to say again though, that your style is refreshingly unique and, because its so different from my own style, its really fun to look at.
final thought: you've made great progress in your fan-art, and i'd really be very happy to see even more.