If these are your first efforts, you obviously are blessed with some natural talent. With this kind of skill-set off the bat, I can't wait to see what you'll produce down the line when you start pushing the envelope more.
I like all of your customs. You are very good at the small details, but like many others I am not a fan of the head choice for the Raven. Maybe a short haired ToyBiz TNA Raven head modded with long hair would look better?