I see small differences between the sides of the face (eg: the wrinkles beneath the eyes) that lead me to believe that he didn't just mirror it, so I commend him on the symmetry.
I personally like the mustache/goatee. It suits the character and gives a better sense of personality to a face that would otherwise have less maturity to it. The facial hair conveys a better sense of age than the face would have in spite of the wrinkles, should he be clean-shaven.
The veins are intriguing, although I don't think they look like veins. They look more like some oddly-placed wrinkles, but they do also give a little more to the character. I'm the kind of person who likes to cover every part in detail, as you can see by the knight I posted, and while this picture doesn't need large amounts of detail to flow, the wrinkles don't hurt it any.
A tip, CB, for drawing veins in the future: they generally aren't so straight and parallel to each other. They spiderweb a lot more, and when just a few show, it looks more like an "x" or a "y", which is why a lot of time in animes a strained character will have a little "x" pop out on their forehead to represent veins. As a reference, try looking at an internal anatomy book that shows the veins and arteries of the human body, or if you don't want to get THAT in-depth and true-to-life, try looking at insect wings. The vein pattern in the wings is similar to our own.
All things considered, this is the first picture of yours I have seen, and I now feel a little more willing to accept your opinion as something coming from someone who really sort of knows what he's talking about. I like the picture a lot, and have attempted similar things much to no avail. I also am PHOTOSHOP-ILLITERATE, so I admire the way you touched up the picture and gave it so much more life than a black and white sketch would have had.
All in all, very nice job! I now again have a slightly better opinion of you. Let's see how long it lasts this time! :hop
9.3 out of 10. The only gripe I have at ALL, is the monotonous color scheme. I do like it and believe that it wouldn't have the same impact were it more vivid, but...I tend to err on the side of a little vibrance to a colored piece.