Title pretty much says it all. I have one MSTP I interviewed at that I feel very strongly about wanting to attend. They make their decisions mid-December, and I was wondering if I should send them an update letter to indicate I'm still very much interested in their program. I feel like they are my top choice, but there are a couple extra variables that might affect my decision later on, so not sure if I would say outright that they are my top choice (rather, I'd say something like "this program is uniquely suited to what I am looking for in an MD/PhD"). I have some stuff to update them on, but nothing I would really go out of my way to say (like I won't be writing to other schools about updates because they just aren't that big a deal). The letter would be mainly to indicate I am still interested. I definitely indicated that in my thank you notes, but I get the feeling most thank you note are that way. So do you guys think I should indicate my interest or will it not do much (or worse, hurt me for some reason)?