Since I'm as old or older than most of the attendings, and have been doing neonatology about as long, I call most of them by their 1st name, and they do likewise. Sometimes I call the head of the unit, "El Jefe`" or "HMFIC". I've actually had name tags made for him, but he's too chicken to wear them!
In front of the pts, I call the attendings "Dr.", but the fellows and residents often introduce themselves to the parents by their 1st names. I sort of follow their lead.
I introduce myself by saying, Hi! My name is Sandi, and I'm you're nurse du jour"
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