An example would be something such as, when posting, if the post content is happy, then (after the image and location/time/post count, right above the rp paragraph(s)) then there could be a small icon of the character looking happy; and if the rp content is of a fight, then the character looking scruffed up or frustrated/angry, and so on. There could be commissions for a small, expression icon set from our many artists here at EJ. And it is not obligatory; not everybody needs expression icons, only those who wish to.
As an alternative, it could be the expression of the character at the top of the post itself; although that may or may not be a little more time-consuming to draw out, it would be less cluttered. Also, in the case of this alternative, only one picture is used to represent the character in his or her profile and team sheet.
Donno, it was just an idea. |D Herp.