Duplicate Portrait warning
That's kind of my thought. I always kind of look to see what everyone else has already picked, but I guess if someone hasn't filled out a Description or posted anything yet, you can't necessarily see. All the same, in all the years I've been here (and it is very many years now, albeit only a fraction of what BBR can claim - granting that every number is a fraction of every other number, if you want to be technical, which, um, gamers? So yeah. Anyway, I was saying something before I got trapped in this labyrinthine parenthetical, wasn't I? Oh, right!) ... I don't believe I'd have ever actually seen this function if it existed.
But the nice thing about it is that when it doesn't come up, it's just not there. It's not like it's going to ask a confirmation every time you choose a portrait, just on the rare occasion someone chooses one already in use in that game. And since there are potentially legitimate reasons for that (playing twins, clones, Everyone Is John, whatever) -- well, it's good that your suggestion already just kind of checks, and doesn't actually interfere.
So yeah. If it's easy - and everything sounds easy when Jase is the one who has to do it - it sounds nice. But it's not a feature I've yearned for yae these many years.
Not like Language Groups. OMG those still blow me away.