Key attributes of an ideal UPSC aspirant include determination, discipline, and resilience. They should possess a strong work ethic and the ability to manage time effectively, balancing diverse subjects and topics. Aspirants need to remain updated with current affairs and possess analytical skills to tackle complex issues critically. Furthermore, adaptability and openness to feedback are essential for continual improvement. Lastly, effective communication skills, both written and verbal, play a critical role in articulating thoughts during the examination process and interviews.