Thanks iPhone!
It's a great thing to know that someone in Michigan, at about 7.500 km (4600 miles) from my home, considers my custom vader his favourite ANH vader. I've put time on him (not a lot, but time) and my final goal it's to catch the essence of darth vader. Every minor detail is important but I think that it have to seem vader from a long distance before to seem vader for the perfect detailing. So, and sorry for my english, the primary objective in my work (or play) on him is to find the overall look, his profile, his outline. Then, I thinks will become easy add a lot of minor detail to improve the screen accuracy.
So, thanks for your kind words drjedisith.