Nothing like a nice regular smile for an appealing picture.  But instead we get a dozen different duck face poses ... or tongues stuck out.  They look like third graders (maybe some guys are into that, but it does nothing for me.)  

I simply do not understand why they think this is attractive.  As you said, a nice smile is what we want to see.

Reuck face

I hate them also and hide their profile right away. I just created my profile on thee today and remember that pose as a popular social media pose from 5-10 years ago. When I see them now in profiles it tells me it is usually a old photo or a very immature girl or both. I'm expecting better from the site.

I agree, the duck face and tongues out turn me off. Also I'm often baffled when a SB states that " my best feature is my smile" or something similar, but she's scowling, not smiling, in all her pics. WTF!

I agree the Miley Cyrus inspired tongue sticking out is stupid.
But what is a duck face?  I think of the lips full of Juvéderm or Restylane, another look I hate.
What I don't like, is the open mouthed photos!  I get that the rounded open mouth means they want to suck my dick, but it's just not an attractive pose.

It's when someone sticks their lips way out, mouth closed.  I guess it's supposed to look like they are kissing, but it just looks stupid.