Blue shimmer funky french

For today I have a simple and quick nail art I made some time ago. It's not my favorite one, I had an idea of making the smiley very straight but afterwards I've learned that I like the more smiling smiley more. ;)

A bit crappy pictures as well. One is with flash and one is in more darkness.

Polishes used:
Sure Promise (light blue)
Sure Promise (blue)

Do you out there have any opinions about smilies? Should the edge be rounded or square? Should the line be straight, natural or exaggerated? :)