I think when uploading pictures, there should be an option to not show on popular images. Not every single picture needs to go on that board.
I understand it's that this site doesn't have a million users (yet ) and pictures usually get 2-8 likes, but I wish every picture I posted didn't show there.
They are not all that interesting to everyone.
And yeah, when commenting links, or posting them, make them clickable, maybe even a thumbnail and title preview (like facebook)