The title of professor doesn't hold a lot of resonance with me. Someone who professes. Eh.
But I am very happy and proud to be a doctor.
Someone who makes people better.
Usually, people think of that in narrow physical terms: healing the ill. But I'd like to think you can also make people better by education. By creating ideas. Maybe by inspiring people, if you're lucky.
(This post draws directly from a line by Russell T Davies in "The Sound of Drums" in series 3 of Doctor Who. Thanks, Russell!)