Pleasure
The Pleasure aspiration comes with the Nightlife expansion pack, and Sims who have this aspiration will typically want to do simple things, such as "Go Downtown", "Play On Couch", and "Juggle Bottles", among other things. Many of the activities that they love to get involved in are located in the 'Downtown' area. They are not hard to please, and enjoy just living life and having fun along the way. Teens of this aspiration generally do not want to go to college badly.
Pleasure Sims, similar to Romance Aspiration Sims, do not want to get married because they prefer to go on lots of dates. Unlike Romance Sims, however, marriage generally doesn't show up as a fear, and Pleasure Sims don't take an aspiration hit from it as Romance Sims typically do.
Depression
If a Sim goes into aspiration depression, they will grab a lamp cover, put it on their head, and start dancing.