A new WebMD article is offering a report on doctors' health and happiness levels.
According to a "physician lifestyle" poll of more than 29,000 doctors, rheumatologists are the happiest, while dermatologists are the healthiest. About a third (that is, 27% of males and 35% of females) of doctors don't drink alcohol. Only a small amount (5% of males and 6% of females) say they're obese.
With no suggested correlation with those or other categories, two percent of all doctors don't own cars. Go figure.
Examine the full report for more details.