I don't know if this is a good suggestion, but I think this is a good idea on my behalf.
Firstly, the profile pictures may express who that person is, but not enough. I mean, it would be nice to add afew more pictures of your other interests.
Maybe there could be a pictures section on the user profile.
Secondly, I think this will show others your own memes, or works of art, which is great.
Finally, I personally get bored of my profile picture and change it frequently. I think this is also what others are like.
I don't know if this will work, but its an idea.
Hope I could be of service!