While at Sims 4 Creator’s Camp, I was able to experiment a bit with the whims of Sims. Below is what I discovered.
Whims are the new wants. Whims are things your Sim wants to do right now. Every Sim can have up to 3 whims at a time. Two of these whims are general whims and will arise from the general situation. They can be generated by situations, traits or one’s career. In fact, mousing over them will tell you exactly what caused them to appear. General whims will stick around until you either fulfill them or cancel them. There is no penalty to canceling them; a new one will take its place pretty quickly.
The third whim is tied directly to the Sim’s current emotion and has been given the nickname a ‘hot whim’. Unlike the two general whims, their hot whim will forcibly change every time a Sim’s dominant emotion changes. Depending on the circumstances, a Sim’s emotion might only last for a few hours. As a result, the aspiration points gained from fulfilling hot whims tend to be higher compared to the effort needed. They can also be chained. If you fulfill a hot whim, it is immediately replaced by another hot whim related to the emotion.