Maybe because you had to stand still for a second or two, there is some blur. I tell ya, if your face would be sharp, this might be a very nice photo. Now is a good photo :) nice idea too by the way :)
If the dark side is so calm, ... ? Im not sure I like how you realized this, Im not sure I like the choice of colour. It's a pitty, becuase there's a photogenic face there.
I think this is a really great idea, however you are a bit OOF, which is difficult to get it perfect that dark. I like your composition however. Nice work.