It looks a bit... like he's falling backwards. That may just be the angle of the shot - I suspect it may be. I await sideshots.
As for painting, get hold of a decent photo editing program, and 'paint' over a picture. You can check colour schemes without actually risking stuffing up the beastie.
About the tipping over: he's not tipping as much to the front as I planned for his charging position, which does give a backwards impression. The reason is that the majority of the mass is in the body, and if I tilt that too much to the front, I get an unstable mini. I guess I might have tilted him a few degrees more, even putting him more to the back of the base, but I chose for maximum balance. The wings should also be fanning out more to the back.