Opportunities. Just... opportunities.
If I don't just forget to do them, they glitch.
One of my sims got that one ice sculpting opportunity. It promised a money rewards and relationship boost with the police officers. He finished the sculpture, and it was worth over 2,000 simoleons. He delivered it to the police station.
But guess what? He got 0 simoleons and no relationship boosts.
However, for whatever reason, EVERY OTHER SIM in my household (including the BABY) was now friends with the entire police force.
I never do opportunities anymore. Lol.
Oh, and also, vegetarian Sims annoy me. (Ironic, considering I'm actually a vegetarian myself.) It's just that I always forget that the sim can't eat meat and end up feeding them Hot Dogs or whatever is sitting on the counter. xD