I noticed that interviewers typically tell you to write or e-mail them with any questions you might have about the school, and it's also starting to look, at least in my case, like a school will waitlist or reject you if they don't think you're very interested. I interviewed at several places in September and October, and I haven't sent anything at all afterwards. The schools I'm most interested in have actually not gotten any letters from me raving about how much I love the school, because up until now I assumed it would annoy them. Now I'm just wondering if keeping in touch with a school post-interview is necessary, particularly if you interviewed early, to keep the committee thinking that you're interested. What has everybody else been doing about this?