When I was a hiring manager, I used to always include a personal note that included suggestions and constructive criticism for the candidate. In a couple of cases, those people replied to me, demonstrated some actions towards those goals, and I hired them later, when I had more available positions. And those that I didn't hire, I encountered them at other companies. It was flattering to hear them say they remembered…
That's seriously awesome. I would so love that. For me most of the time they just stop responding, even right after "I'll get back to you by the end of the day!" type conversations.
I don't care if it is a no, I just want to get a message, and feedback would be even better.
One company I wanted to work at recently did exactly what I described .... all hyped up meeting, we all got along, good stuff, we'll get back to you by the end of the day. Then nothing, I called a bit later, emailed, nothing.... My impression was pretty negative.
I have a job now, I'm excited to start it, that other company, very negative feelings towards that other company ... if they just sent an email even to say no I'd feel better about it, but nothing.