I personally feel that people are most open on snapchat since you only have friends that you regularly interact with.
On facebook you only upload posts/pictures that matter, on Instagram you only upload pictures where you look really good or a picture of food (I personally hate it, unless it's something unique) whereas on snapchat you'll send pictures to friends where it doesn't matter how you look.
On facebook you only upload posts/pictures that matter, on Instagram you only upload pictures where you look really good or a picture of food (I personally hate it, unless it's something unique) whereas on snapchat you'll send pictures to friends where it doesn't matter how you look.