For the same reasons Cinebar points out above I have given up relying on the sims themselves to create emergent stories that have that any real element to it. Letting them do what they want is closer to Looney Tunes without the violence. Occasionally they surprise me.
You can do drama though. I was experimenting when I discovered that they had added a first person camera since I last played and I happen to have a household with mum. dad and child. Dad had hate children trait. I was using the arrow keys to switch between the sims POV and realised it also gave the kids point of view so I let the game roll staying with the kid. I lasted about 20 minutes. Heavy stuff.