Lifetime Want

A sim's Lifetime Want hard to reach most of the time. Most Sims want to reach the top of a career track, raise 20 puppies or kittens, marry off six children, have a golden anniversary or graduate three kids from college.

Once this lifetime Want is fulfilled, the Sims will go into a state named Permanent-Platinum-Mood (mostly also known as perma-plat) which will give them unlimited chances to use aspiration bonuses without any failure.