What is your favorite feature, even tiny one, in the franchise? (Not just the "main" games!)

I never had them, those little olive-green army men instead. Rather says something about the game when getting your sims ready to play is often more fun than the game itself. At least in CAS I can make sims that look like interesting characters (Roman soldiers, pirates, D&D style adventurers, etc. even if they can't be played that way. Could come close in 1 & 2, but not in 4.