"Why not nursing as they have a much better interaction with patients and a much greater influence on the hospital experience of the patient?" (you're gonna get grilled like this in the interview)
Nursing and Medicine perform very different roles in the hospital and you need to work out what role better suits what you envision as your kind of patient care. There's quite a bit of mission creep depending on the type of nursing you do into medicine but they're totally different jobs and merit serious consideration