I've previously blogged about facial asymmetry and attractiveness. Research in this area often works with facial composites - photos that combine facial elements of multiple faces - and found that composites are often viewed as more attractive. This is because composites average across various (often asymmetrical) features.
I saw this post on Facebook today and thought it made a nice follow-up to my post: composite faces using celebrities. Enjoy!
Still asymmetrically yours,