You know there's these guys on deviantART and of course other places, that are almost sickly good illustrators. What they create is images!
Your gallery is a good example of what the difference is between an illustrator and an Artist.
You are an Artist! And I really enjoyed looking at your artworks.
This is stuff you can hang on a wall, an really good action image of Spider Man vs Hulk don't work as good. your stuff has a soule and that's nothing that you can learn.