|When a sim achieves his lifetime aspiration, he's blessed with permanent platinum aspiration level. To achieve this, you usually need to do something quite difficult, like maxing all skills, reach the top of a certain career or have 50 dreamdates.
Now what if your Sim is in the Military career, but your Lifetime want is to 'Become Hall of Famer"?
Now you have the choice to quit the Military and become an athlete but that's not always what you want. Boolprop to the rescue!
In the Neighbourhoodscreen, open up the cheat window and enter the cheat:
boolprop TestingCheatsEnabled true
Enter a lot, shift-click on a sim and click 'more...' until you see: Spawn... Then choose 'More...' until you see Sim Modder
The object you now get is a statue of a baby. When it has appeared, you may disable the boolprop cheat with boolprop TestingCheatsEnabled false
Then just click the babystatue, choose Wants and Fears... and then Lifetime...
The option you need to choose next is: Cycle Through ALL Lifetime Wants
After clicking that option, you get a different Lifetime want. As you can see, you cannot choose your want, but if you're not happy with the result, just repeat the process.
Check the Lifetime Platinum list to see which wants there are for each aspiration.