Re: Rev. Tate Preview
You have the outer corners of his eyes slanting downwards, giving him somewhat of a "hang dog" look, which you've overemphasized by the dark downwards laugh lines. You should make the inner corners angle slightly upwards, and minimize those downward wrinkles.
The bottom half of his face shows a strong perspective distortion to his left (the RH side, as viewed), but his chin distorts to his right, and the chin and jawline are too narrow and pointy. His chin is more rounded, and the shadow you show at the bottom of his chin, is actually a bit of a "double chin," with his real chin line about 1/3" higher up. You've also shaded the upper "ball of the chin" curve crooked, angling to the left, rather than being level, as in the picture.
His upper lip is a bit too narrow on the LH side, as viewed. It should extend to the corner of the mouth. The right side, as viewed, is too long, making his mouth look somewhat lopsided. The mouth should extend from pupil to pupil on the face. This is a large part of the proportion distortion, which is compounded by his nose being too long, with the nostrils too far down, and misshapen.
His eyebrows are too narrow and tapered in shape. If you look from the arch outward, you will see that this man's eyebrows are fairly wide, and untweezed, with hairs, not shapes or shadows or pale "tails."
The top of his head is too "poofy," contributing to the overly long head effect.
His shoulders are too low, making his neck too long. Even though the photo has him in a windbreaker jacket, his shoulders will be higher, and slightly more rounded in shape.
Mind you, many people will not notice such fine details, because they will not be looking at a photograph next to the portrait, nor necessarily the subject standing next to it, with that exact same expression. Overall, this is a good portrait, with very nice, even, smoothly blended lines and shading. I merely post these observations, to help your "viewer's eye" see some things that you many have missed.