Ambitious Sims dream big and are more rewarded when their wishes are satisfied in life. They are driven to move up the corporate ladder more quickly, but fall prey to low mood if they don't quickly receive the promotion they desire.
Ambitious Sims tend to excel academically while at University.
If a Sim has the moodlet "Anxious to advance" and changes traits, it will be unable to get rid of the moodlet, except by using the Moodlet ManagerLifetime Reward or drinking a Sorrow Annihilator juice in Late Night. Neurotic Sims can also get rid of the moodlet by using the "Share Worries" interaction on other Sims.
A Sim with this trait is 10% more likely to experience a midlife crisis, compared to a Sim without this trait.[TS3G]
An ambitious child or teenager will have possible future lifetime wishes appear more often.
Ambitious Sims react very positively when being asked about their careers - even if they're unemployed/retired.
Ambitious Sims gain wishes relating to high tier financial goals more often than other Sims, such as becoming a business partner/owner or having a certain net value of Simoleons.
Ambitious Elderly Sims are more likely to have wishes for their children to reach a certain tier in a career than their normal counterparts. For instance, an elderly retired Emperor of Evil with this trait will wish to "See (Sim's Name) Become a Criminal Mastermind". Insane Elderly Sims generate random career wishes for their children that may not have anything to do with the career they were formerly in.