Sims that take a Knowledge Aspiration get the Quick Learner Bonus Trait which speeds up the experience rate of all skills!. I will assume you are familiar with what I did in 101, or check that out first since I will not explain any inputs that are the same as in that one. I personally enjoy completing the smaller, more unique goals that come along with aspirations so this doesn. Most of the aspirations involve reaching level 10 of a specific career field or woohooing lots of sims. It allows Sims to build music and performance skills and fame 2x, gives the Piper trait rewards, and adds a new buff when licensed songs that allows for sims to license songs every.
It requires one to be employed in the Entertainer Career (which I have plans to expand).
Special appreciation for this mod, which also gives the game a sense of completion. In The Sims 4, you can be a rocket scientist, but there is no career for it! With the rocket science skill already present in the game, being a rocket scientist is a no-brainer.