Sean Luo messaged me a couple of days ago to suggest that the player with the most number of games over the preceding 6 months have a cap added to his avatar (in the same way those who win the team selector/captain 6-monthly season have a star added). I've fine with that. Just need to find a suitable icon. I'll start a thread on the "Introductions, Requests & Chat" board to discuss this.
Here is the thread.
Anyone who finds a suitable icon, add it as an image in a post below, and I will choose one later.