I love the color; the orange is very vivid, yet it does not grate on my eyes, there is also a pleasant dose of contrast between shades of orange, so you see clearly. The orange light, and shadows are also very impressive, because they add texture and realism.
I love how there are chains/hooks/gears/etc in the background, but they do not detract attention from the main focus of the image. Speaking of the main focus, I love how the orange lines on his(its?) back smoothly lead my eyes, to rest on his(its?) face.
Finally, I love how the more I look, the more detail I find; like the horned creatures at the bottom, the skull at the creatures belt, or the glowing eyes, embedded in a face in his/its muscular shoulder.