Final answer:
Charlie is portrayed as having a good nature, being interested and eager to please, which suggests he is kind, cooperative, and has a desire to learn.
Step-by-step explanation:
The quotation reveals that Charlie, despite some intellectual limitations, possesses several positive character traits. First, he is described as having a 'good nature', indicating that he is likely kind and agreeable. His eagerness to please suggests he is cooperative and strives to be helpful or fulfill expectations.
Additionally, being characterized as 'interested' implies that Charlie has a desire to learn and is curious about the world around him. These traits make him stand out from others of similar intellectual ability, who are mentioned to be generally uncooperative and apathetic.