Based on the passage, it can be inferred that Gregor does not regret his career or wish for a new one. Additionally, he is not explicitly portrayed as happy about the size of his room. However, the passage does support the inference that Gregor believes his life could change by adopting new habits and routines.
Based on the passage, two inferences can be made about Gregor. First, there is no indication that he regrets his career or wishes for a new one. The passage does not provide any insight into Gregor's feelings about his job, and his transformation into an insect is the central focus of the narrative.
Second, Gregor's contentment with the size of his room is not explicitly mentioned in the passage. The text does describe his room as small, but it does not delve into his emotions regarding its size. Therefore, the inference that he is happy about the small room is not supported by the provided passage.
On the other hand, the passage does suggest that Gregor is not content to be an insect that stays in bed and sleeps all day. He expresses a desire to adopt new habits and routines, indicating a willingness to change and improve his situation.