What do dermatologist who like to care for their skin, use on their skin?

Depends: It depends if they are male or female. I rarely use anything on my skin except soap and water and sun avoidance by long sleeve shirts and long pants (even when gardening or at the beach) and a hat. Sunscreen on exposed areas when outside. My wife, who is a dermatologist specializing in cosmetic concerns of women uses many different creams and lotions on her skin but i don't pay attention to them.