I realized the portrait was looking like the model but he was starting to look like an older incarnation of himself so I sent him off to the fountain of youth. Above right is the before picture and left is the after. I desaturated them so the differences in the color cast won't distract. I spent a lot of time rounding his face more from all sides. and unsquaring his jaw. I also enlarged his irises and even thinned out his neck a little bit. Now if I could make people look younger in real life.
If you like this post, I wrote a post a while back on how to drop 5-10 years in your reference photographs: http://nicolecaulfieldfineart.blogspot.com/2009/06/how-to-drop-5-10-years.html