This is a hard one, isn't it? I may have a bit of an advantage, because I knew several of my great-grandparents.
Grandfather: Steel work business, owner (Sr.)
Great-grandfather: steel work business, owner (Uncle Henry, aka Poppa)
Great-grandmother: Stay at home parent, kept house (otherwise, not sure...) (Naomi)
Grandmother: worked as a servant before marriage, stay at home parent once married, did data entry after divorce (keypunch cards)
Great-grandfather: not sure (Pop)
Great-grandmother: not sure (may have kept a boarding house after divorce?) (Ahma)
Grandfather: artist, illustrator, draftsman (I found a piece he'd illustrated for Lockheed on ebay once, and got it for my Mom.)
Great-grandfather (Adoptive father): not sure (Kem)
Great-grandfather (Biological father): not sure
Great-grandmother: schoolteacher until marriage, then kept house, I think. (Grandma Kem)
Grandmother: stay at home parent, kept house; worked for an insurance company after divorce/widowhood.
Great-grandfather: steel worker (Peck)
Great Grandmother: stay at home parent, kept house, invested in real estate (Blanche)