The best reason to conduct an in-person interview is to get a complete impression of the person. In-person interviews allow the interviewer to observe non-verbal cues, body language, and facial expressions, which can provide valuable insights into the interviewee's character, confidence, and communication skills. Additionally, meeting in person allows for a more interactive conversation, enabling the interviewer to delve deeper into certain topics or ask follow-up questions based on the interviewee's responses.