"These sims[sic] are all about themselves! They can Fish for Compliments, are more excited when receiving a present, and may become tense when they haven't gotten enough attention. The celebrity spotlight is something they generally relish. After all, everyone else should love them as much as they do themselves, right?"
Self-absorbed Sims can request compliments from other Sims with the "Fish for Compliments" interaction.
Self-absorbed Sims will become tense if they don't perform social activities in a while.
Self-absorbed Sims rejoice when they are given gifts.[TS4:S]
Self-absorbed Sims will become very angry if other Sims forget to celebrate their birthday.