Hmm, I'm not so fond of the scratches, to prominent indeed. But I'm sure you'll get this fixed, I can see where you are going :)
The reflection in his nose/mask/thing is a bit weird. I can see where it's coming from but it looks strange.
Love your suit control panel! It's funny though, I once was at an Star Wars exhibition in Brussels (2007) and they had The actual Darth Vader suit. This control panel turned out to be just an piece of wood, painted and decorated with some lights and switches you can buy at any electronics shop.....And here we are with our fast super computers trying to replicate what was once just a piece of wood, i can see the irony in that :)
Really love both of your modeling skills!!
Btw: they also had about a zillion lightsabers. Sadly, none of them worked :)
-W-