Another great improvement!
I was just about to tell you about the contrast of the shirt. Darker contrasts makes it more realistic.
You could try adding some emotion to him now. Something like, a angry look in his face with only 4 pixels above his sunglasses, and that would be the eyebrows. Or, maybe a sarcastic smile. Maybe a jacket, a cap, things that would add emotion to the character. What I told you were only examples, but if you like one of them, you can use it!
That way the shirt goes up, too, I think it shouldn't happen. It's a little unnecessary and it takes some attention. I think you should either remove it, or make that part of the animation less... 'strong'.
And I think you could rework the pallete of the hair. Maybe making it a little darker. I think he shading makes it look like it is glowing.
And there's one little pixel on the arm that is really unconfortable at least for me. The shirt isn't moving, but the shading is. That shouldn't happen. Try removing it.
Good job so far!