Well my friend, this piece is VERY original. Your take on Yami is awesome, he looks older, more realistic but I'm sure you've noticed these things yourself.
The main thing I'd like to mention is the shading. VERY WELL DONE. It adds depth to the picture of course and you executed it very well. Looking forward to looking over your other pieces and seeing new ones as well. Haha, to be honest I'm quite jealous ^.^ Keep it up.