You want to try and bring a character to life in an honest a way as you possibly can. It doesn't matter whether he's a doctor, an actor, a car salesman or a captain of a starship. If you can bring truth and honesty to that character, then your audience will believe you.
“But I was losing so much bone density that I would have been in grave danger. And I mean grave danger. If I had let it go just a few more years I could have broken my hip or spine just picking up my granddaughter.”
“Computers are magnificent tools for the realization of our dreams, but no machine can replace the human spark of spirit, compassion, love, and understanding.”