You saw my thread!
Dude you're the one being kind now
You comment there too?
As Robert De Nero once said (when there is doubt there is no doubt.) 'course that was just a movie I highly doubt he had painting in mind but I found it to be quite true when I paint something.
If you have an absaloutly clear image of your subject in your head and you're sure then by all means do it from memory but if you are like most of us and the image is not so clear "fuzzy" in your minds eye then don't. Some great painters could do things from memory but that came after years and years of experience and practice, to my opinion the images in their heads just got more and more clearer and they could see their paitings/drawings before they put a stroke, that my friend is a completely different level of freedom that anyone one day would wish to achieve
As of the eyes I didnt want to say anything about them because it might be an assymatry issue...my eyes defy the 3 eye rule so i didnt want say anything
but if your dad doesn't have it then you should work a bit on the eyes and the positioning of his right ear. That should fix things.