Great job with the monotone conversion! The eyes appear a little dark or racoon-like, probably from the shadow cast by the brim of the hat. I think a little more texture/sharpness on his skin would give the photo a slightly more "gritty" appeal that would work with the overall style. Lastly, I think the crop is a hair tight. Having the entire head/hat in the frame as well as a little more breathing room to the right of the frame could have improved an already pleasing image. I think this image would make a fantastic gift for your friend. Cheers.