Love the style for your take on the guys - a little more realistic and detailed than the cartoon versions without going the creepy sort-of-human route. Splinter looks a bit like a dog, but that's been kinda consistent for most of the official versions too, heh heh. I think he looks pretty dang appealing anyway.
Turtles and Heman... That's what my childhood was about... Love Leonardo's face. I was actually quite in awe when I found out one of my old lecturers worked on the Leonardo costume for the 1st Ninja Turtles Movie.