Don't call me Doctor
It's a funny thing, but a professor being called "Doctor Mayhew..." is actually a low status marker. In Cal Newport's book How To Be a High School Superstar, which my daughter is reading, I found a confirmation of this. He refers to "an elegant experiment in which researchers called the voice mail of professors in the California public university system. As predicted, the better the school's rating, the less likely they were to hear 'you've reached Doctor...' start the voice mail greeting" (p. 151). It makes perfect sense. If you aren't a physician, you don't need to be called doctor just because you have a PhD. If you feel the need to use the doctor title, you are very insecure.