How to Smile for Pictures

I think one smile would be nice, but you know, it doesn't have to be like a poet smile. I actually smile on every single photo, except for the last one. Even if it's posed candid, I feel like it's still better than just default smile. Actually, how do you guys feel about like a troll photo slash like, you know, when they have like four, like really badly cropped Facebook memes on there, and then one picture of them?