It has a very intriguing shape. Not the typical muscular and fit design used most often, but the heavier nature, which makes this guy quite admirable. My only complaint is that the mask doesn’t really fit in well with the rest of the build. The sleek design of it stands out quite a bit. I’d prefer maybe the mask of fire, or even stone.
I feel like some more color is needed, some gaps could be filled in in the waist, and as @Stuubh said, the mask doesn’t really fit. Also, why the random gears?