Since it’s being used as a con for Sims 3 so much I must add this con to Sims 4 (because it absolutely is for me): identical sims. More so than in Sims 3 I see everybody playing with the very same 3 or 4 default sims in the game (for both genders). I have no idea why but I personally don’t have that issue in Sims 3. I even often recognize who made a certain sim in that game, simmers manage to give their creations their own ‘trademark’ somehow.
P.s. Doesn’t this topic fit better in the new Franchise section by the way?