This is a beautiful start and I will certainly follow this one's progression. It does have a very 'almost natural' feel to it.
I think what Korash is trying to say is the map does not have an organic irregularity to it. Natural coastlines have a less smooth smoothness to them. I was reminded of the Korean peninsula when I first saw this but then, as I looked deeper into the details, it felt kinda globular, more like a fluid flow rather than a land form. I don't know if this is due in part to the shadow around the coasts or not. All in all, it's a great map thus far and I do enjoy it.