Okay, so I found a major flaw in wants system — most of them seem to be basegame. That means if you create a sim with pack-only traits and aspiration, they will have only boring generic wants like "get to know X" or even NO WANTS AT ALL. That was the case for my cat-loving, high maintenance, unflirty sim. Just after creation she wanted... nothing. Like nothing at all. Then I took her to a bar and she got a want to order a drink, and after chatting with some sims she got a want to know them better. But that was all.