I really love this, the overall impact is really good, i gave you a 4.5/5 for originality because although you see lots of drawings of snarling big cats, you don't see many from this angle, there's a good show of attention to detail in the fur, gums and whiskers, the shading is fantabulous and I really enjoy looking at this piece, the only things I can see that you could add or do better with this is that sometimes the whiskers get split ends just like our hair does, so that could add a bit more realism to this. Also the ear fluff on the left ear seems rather controlled in the way it isn't as shaggy or varied in length like you see in the right ear. Hopefully you can use this to improve.
Holy mother, this is incredibly amazing! I love every detail, you had to spend years to make it. I admire your patience too, but, of course, your talent is the most incredible thing.
(I am a bit busy, so I would not write the rest of 100 words. I just want to let you know your work is incredible and if you want to use more of my stuff as a reference for your own art, you surely can! And do not forget to tell me about the finished piece of art because I definitely want to see it! ). Fantastic!