What is your favourite Sims 4 Challenge?

I wish I had the fortitude for a legacy challenge or the 100 babies one. The furthest I've gotten down the chain is 4, I think. I've gotten attached to most of the sims in the challenges I have done though, and usually play them after the challenge is over. (No save of mine is really "over"--in my mind/heart, anyway.) Some challenges I've enjoyed include Asylum, Room, Socialist, and a good ol' Rags to Riches with a twist (like Run Away). :smiley: