Wow! You put a lot of work into this and it's awesome...and to think I was able to land my new job without all this info, so YAY ME!!!lol. Tell me what you think about humor in an interview. The nurse manager I interviewed with had a bubbly personality and we seemed to hit it off immediately. She asked me, where do you see yourself in 3 years. Before I knew it I answered "here", and she laughed so hard. It was still professional, wasn't like night at the improv. Just not so stiff and formal. I took my cues from her.
She also asked me a question, that through all my prepping for the interview I hadn't expected. She asked "what do you think the patients expect out of you?" I could've rattled off something, but I wanted to give a powerful answer (like you said sell myself), so I took a moment but I told her "you kind of stumped me." I recovered and came back strong with a response.
I did most of the things you wrote about here, would've loved this about a month ago. It was the most honest and effortless interview I've ever had and I hope it's the beginning of an amazing and long career at this hospital.