Damn, Bison, those look really good.
The armor/cloth/etc. looks okay to me, although admittedly it's easy to say that after the fact (when you've already painted them). I can see where the facial details on the 1st and 4th figures might be a bit lacking, though I'm not sure I'd have noticed if you'd not pointed it out. Still a very nice job overall; I envy your skill.