wow!!! why is it so damn good...phenomenal....unbelievably awesome....i have almost mistaken it for a photo....the proportions, details, values all spot on.....
i too sketch sometimes, for sure not this good, i really need advice of someone professional to improve, as i am self taught. thank you for sharing :)
this is my latest post:

https://steemit.com/art/@sahchandan/game-of-thrones-sketch-series-sketch-1-ser-davos-seaworth