Most Helpful Guy
I'd say the one on the left looks more attractive, though they're both pretty attractive, to me. The one on the left also looks more approachable, her smile is less forced maybe. But still not entirely genuine: she isn't smiling with her eyes. Neither are smiling with their eyes, but the one on the right isn't, at all.
Can't really describe the characteristics that make me think the one on the left is more attractive... I'm thinking, but I can't really figure it out. She just is, to me.
The one on the right seems like she's more headstrong. The one on the left seems more open, less judgmental possibly.
I think it really depends on facial expression, I guess. Since it's just a photo, the expressions are locked in one expression. One could only see how approachable they are at the moment of the picture.
Wow. Everyone said left. Seems like males tend to agree on attractiveness more often than not.1