So here's the problem. Went to school, interviewed with a student interviewer, then later with a faculty member. Now there were clearly two different vibes in these interviews, and I don't want to mess up the vibe with the student interviewer by sending something as formal as a thank you letter. I suppose I could tone it down to a thank you note, but I'm not certain. I definitely don't want to send one to the faculty but not the student. Thoughts, advice?