Fit, like a tennis-club member middle aged doctor who’s hitting a midlife crisis. He really only has work friends, his assistants at the hospital and clinic, and other doctors and nurses and researchers. Tries to be chummy but is pretty competitive. A little creepy, a little chauvinistic. Always flirty with more attractive women, dismissive of those he thinks are beneath him. He can be self-aware about his faults, feels guilty about a lot of the negatives, but can justify them, to himself. But it's very easy for him to lose moral control in face of him ambitions.