Oh, board games would be a really fun stuff pack. Gives our sims something to do!
Maybe D&D can be the most fleshed out one... maybe you could even get to decide what kind of players your sims are. What they're playing as. Their character's name, race, class, alignment. Just as a minor feature!
Maybe with each different board game you would get notifications for an approximation of what's going on in their game as well.
I admit I don't take much time out of my day to play board games in real life anymore, but our sims really don't have enough stuff to do.
This could also be a part of a Freetime-kinda gamepack. I mean, a free patch with board games would be amazing, but I'm trying to stay realistic. New functional items are usually DLC.