Novelty? A challenge? A lot of people don't do well without work, or even some sort of conflict. You can keep it low-key, like games or something...

[...honestly? Michael doesn't like the real answer much either. But he grimaces a little, and goes on after a moment:]

Really, though, they always want a way out. A chance to change, or move on, something like that. I don't really get it myself, but - when I took over the Good Place, what the people there really wanted was a door. It goes out, even I don't know what happens when you go through it. Kinda freaks me out, to be honest, but...it was the first time I saw those sadsacks actually happy, and they'd been in Heaven for a thousand years by then.