* Being popular: Greg desperately wants to be popular in middle school. He tries to fit in with the "cool" kids and often worries about what others think of him. He's envious of his older brother Rodrick's popularity.
* His friendship with Rowley: Despite their occasional arguments, Greg values his friendship with Rowley. He enjoys spending time with him and often relies on Rowley for support.
* Avoiding embarrassing situations: Greg is very sensitive about avoiding embarrassing situations. He's constantly worried about being the target of ridicule and tries to steer clear of anything that could make him look foolish.
* Getting his parents' approval: Greg wants to impress his parents and win their approval. He often tries to avoid getting into trouble and hopes to earn their respect.
* His diary: Greg uses his diary as a way to process his thoughts and feelings. He confides in it about his worries, fears, and dreams.
While popularity is a major driving force in the story, Greg's relationship with Rowley, his desire to avoid embarrassment, and his hope for his parents' approval are also significant. He navigates the challenges of middle school with these values in mind, often leading to hilarious and relatable situations.