I know in some cultures, and maybe some places in the North & North-East, smiling isn't as common, or perhaps seen as "superficial." does it matter to you?
It absolutely matters! A woman with the face of an undertaker is NOT someone I want to spend a lot of time with!
A woman who doesn't smile or laugh easily - and without trying to fake it - isn't someone I'd want to be involved with either. She's happy and a happy person and such a woman is a lot more desirable than those who want to act like victims or talk shit about how much they don't need a man but then complain because no man wants them.
Oh yes. A natural smile is an amazing asset, especially on a woman. “Resting bitch face” is definitely a detriment and probably prevents many people from starting and having wonderful relationships.
A smile is so important in expressing yourself. An “easy smile” absolutely! And depending on what you want to convey a smile and a wink is even better!