Well i like the right side of it then we get to the render which looks like just a head there sorta weird looking =) and the left side sorta a to big a contrast to the rest of the sig and also has nothing in it, so full of life then sorta ... dead looks good could use improvement in those areas though
In comparison to your other sig, this one is very good... Overall, this one could use less contrast, more flow, and better lighting. 5.5/10
even tho some effects are very nice, it's completely lacks flow, and it looks like the head is floating by itself, which i don't like much. there's also too much empty space imo