Good stuff. I think you can get a lot looser and more dramatic. I get a very stiff feeling from them.
Try opening your perspectives up in light sketch form first. Get that down and then start iterating over that. Check this out. 15 minute sharpie sketch getting your design in a wider, more expressive perspective. Think of the difference between taking a picture of a car with the camera far away vs the camera much closer to the car. As the camera gets closer the perspective starts to really push.
