At one school, my kid’s AO was really young. He did a wonderful job of keeping connected throughout the process and making sure that all of my kid’s questions were answered. After my kid declined at that school, I actually emailed the head of admissions at the school and told him what a great job the AO had done. I’m not suggesting anyone do this - I just feel its important to let bosses know when their employees are doing their jobs well.
We’re now going through a similar process with colleges. The application/admissions process there has been pretty impersonal but for the few schools that have reached out or sent special letters/emails, its tough to say goodbye without feeling bad.