Wow, I feel like a punk. I didn't know sentret was doing an alakazam too; I would have switched if I had the chance too :/. Oh well, it looks great along with the other submissions so far!
Went for an uppity neutral/don't give a fuck kind of mood.
I know right? Way too many amazing submissions so far!
As for the themes, I can't complain. Every time there's a new MAC the theme is great and a picture instantly springs to mind. I know this probably the constructive criticism you were looking for but I can't really criticize what I don't find fault with!
I can't really say much about the themes since I'm new, but I rather like the way they've been handled so far. A simple theme does allow an artist to put forth the most creativity, so personally I'd say keep them the way they are.