If they have a title, do you call them "Doctor" or by their first name? When mine calls me, she always identifies herself by her first and last name, no "Dr. xxxxx". I don't feel comfortable calling her by her first name, because it would feel too much like she's my friend. So if I happen to leave a voicemail (the only way of contacting her - no e-mail or text), I usually will not address her at all, just "Hi, this is..." but if I do, I say "Doctor". I feel she's earned that title, so she deserves to be called that, IMO.

Just curious!