Are you kidding? It's best on dark skins, because it's so camouflaged!
But seriously, the first one or the shifty-eyes one would be good, I just want a ninja smiley.
You'd think that, but the problem is actually that there's so little contrast between the right side of the smiley and the background. It might look decent on a black/dark grey background, but we don't have any of those to check with.