Have a pie chart that shows what percentage of the games you’ve beaten are of what genre on your profile page that can be made public. For example, mine might be 33% Action, 47% RPG, 10% Platformer, and 10% Shooter.
If you wanted, collecting that data could also allow you to make a Recommended Games section. (You could also take into account what genres are disproportionately common on the Abandoned section.