The very first thing I noticed about this portrait is the eyes. They portray a powerful, burning anger, that seems to sear the viewer with its intensity. As far as the lighting goes, it is indeed well set up in this instance, and it adds flavoring to the overall mood of the scene. From what I have seen of your other art, I must say that this one is most definitely one to admire. The amount of effort you put into this one, and the pains you took to make each color as vibrant as it could possibly be is clear, and it demands respect. I believe that this is some of your best work.
Man, I've spent the last few minutes TRYING to find something to critique about this, but, my poor, untrained eyes got nothing.
Now here comes the rave;
even after staring at this for so long, I still cannot fully take in the amount of depth and detail you've woven into this piece! I'm particularly envious of the lighting on (veiwers) let ear. How the skin is lit up and, almost translucent, as you often see in real life when light hits, say, a cat, a certain way. I can even see the silhouette of a vein and where the thin skin ends and curves into the thicker shape of the ear!
Furthermore, the subtle contrast from warm back light to cool local colour for on the creature is great! Very pleasing to the eye and the little added bonuses, like, the dust particles caught in the light just beside the snout and the contrast in detail and shadow in the fur (something I myself struggle with.) are an extra treat! Superb piece all around and I look forwards to more ftom you!