I love the picture. The design, the texture, everything is great. If I were to make any suggestions it would be to drop the saturation of the lights on the robot. Not the lights themselves, but the glow around them.
I've noticed in images with glowing bits that things tend to look..well I hesitate to say 'more realistic', but definitely better when you have at least two levels of glow. First, a very solid looking glow that extends just past the borders of the line work, and then a glow that is lowered in both opacity and saturation that extends further.