Hmm..
I used to have my own picture as my avatar on FB. now i have a drawing that represents me. and the cover picture was of a quote i found in a store one day and took a picture of, until about a year ago, when i made a graphic of a few pics of me as a lil kid.
my reasoning was, avatar = current, cover photo (that appears behind the avatar but above everything else) = past

And many years ago, i made one of my cats a FB account. XD i never sign into it anymore, but i used to also use her account for games, when i didn't have very many neighbors.

but i've really tried to tone it down with the self perceptions type of things. it can come off as being self center (in my experience), so even tho i dont mean it that way, i'm a lot more distant in my activities and speaking on FB..
really the only thing i use FB for anymore is for the games.

I think it would be much like interpreting someone else's dream. a person really has to know the other person, to really get an accurate meaning of the origin that it is produced in.
(that's only a personal opinion tho).