I had made the implicit promise to myself that I wouldn't spend TOO much time on the ME fan art pieces, so I sent them in today. I followed
remmak's suggestion about the turian's neck being too thick, but I couldn't motivate myself enough to add in some more details. Instead, I touched up a few things in Spaceborn that had been bugging me. (I'm still NOT very happy with the mouth, but I think it's kinda better and closer to my in-game Shepard's). So here they both are!
And the obligatory close-up: