This is just another way of keeping nurses under their thumb...they don't want us getting too familiar or comfortable on the job or they might lose power.
In front of patients I address doctors appropriately. When we are away from the patient and he/she prefers first name, I will then use it.
What kinda bothers me here is why is it OK for patients, staff and everyone to refer to US by first name...seems it would be more 'professional' for me to be addressed as 'Nurse Jones' as well, eh? I believe it overfamiliarizes to address by first name in professional settings with patient relationships, personally.
And I wouldn't mind being addressed as 'Nurse Jones' by docs, patients, etc by the way...it might help with public perception of our status as professionals. Particularly with so many hospital employees in scrubs today. When I first started out in nursing, we were addressed in this way for a short time til things relaxed a bit. Course we also wore caps and dress whites...