He also mentions being "one of the few honest people that I have ever known." This statement foreshadows his role as the moral compass of the story, as he observes and judges the actions of the characters around him.
Overall, Nick portrays himself as someone who is observant, thoughtful, and somewhat idealistic. He believes in the "golden age" of the past, but also recognizes the flaws and superficiality of the present. His self-description sets the stage for his journey of discovery and disillusionment throughout the novel.