Wow, really nice painting, especially on the face!! I also like the vectored hair and the way it is colored, though the painted ear sticking out of it looks somewhat awkward to me because it's fully painted. The face has vector-ish eyes and the painting on the skin seems to be smoother, so it matches the way the hair was done more than the ear.

And while I see that the character you are portraying is supposed to have white skin, I don't think his skin should be tinted blue. Actually, I just think that it should be a different color from his clothes. The way he is colored right now (mostly blue) makes him look like a statue, especially since the columns are tan and the sky and ocean are different types of blue. I know this would take away from your concept, but I feel gray columns would be better, because the warm color looks out of place. I think it's an art rule that we can't have one part of a painting that is completely warm and the others be completely cool. We also have to put colors that we have in one area to other areas as well, so that everything seems whole. If the character is to stay colored the way he is, then more of the color that is used on him should be used in the background. If not, there should be more variation in colors on him (more warm), but the background and him should share the same hue (I actually don't know what I'm talking about). There should be other ways to make him look cold without having to use only cool colors, hehe. Oh, and about the columns, I don't think a Japanese looking man matches the western architecture XD But anyway, it's great that you're trying something new and doing a more scenic wall!

You should be using your extra time to study >BD!