Your anatomy is really good and also is the clothing.
The Details in the clothing, the folding just great!
The nebulous white space blends out the things in the background effective an draws the focus to the main part of the picture.
The pose is working out perfectly and very oratorical.
Your coloring is... i dont want to say sloppy... just inconsistent.
You did good as you do the folds in his pants but sometimes the shading appears to be random and lazy like you where not aware of the lightsource.
Also the handle and sheath of the sword are low on details, i can not guess which material it is.
The many white lines let all materials look glossy and shiny which looks unfitting sometimes.
It looks a bit odd how the hair is blending in the head because the hard outlines dont support this effect.
But there is one thing that you really have to explain.
Is there a sixth finger on his hand?
You should be carefull with such things, they can blast the whole picture!
In the End i can say that this picture is full of expression and very dynamic!
Your anatomy skills are very advanced.
That's his stomach showing < u >;;
I wasn't really given a ref for the sheath so I didn't want to add much detail to it. But it ended up looking like... glossy and I really like that :'D
The hair thing
Huff... That's kinda how I do all of the hair I draw, It's a part of my style
But thank you for your opinion on this!
It's really appreciated and I'll be taking it into consideration next time I draw something c: