Traditionally, before the revolution, the ancestors trades are tied to the land, from the most noble to the most difficult: winegrowers, farmer owners, ploughmen, sharecroppers, etc.
The Bouzereau are winegrowers while the Davy/David are sharecroppers.
After the revolution, the professions diversified a lot, in healthcare (doctors, opticians, veterinarians), in services (bankers, government agents), industry (engineers, business leaders), luxury (jewellers), culture (musicians), army (soldiers).

In the above, there are only masculine words. I had fun building two graphs of the occupation percentages of people listed in the trees between the beginning of the 17th century and 1950.
The first (percentage of professions #1) includes only the professions indicated in the acts, almost all of them are for men (we very rarely find the profession of a deceased woman with indicated farmer, winemaker, seamstress).