Mining stations and habitats are involved with resource extraction (asteroid based mining colonies) resource refining (space based refineries and foundries) and the logistics involved. Mining stations are common, and can range from small automated facilities to large multi-nation enterprises.
Industrial stations and habitats are closely related to mining operations, but these operations produce some sort of finished good. This can range from toys to spaceships, factory produced food to spaceship fuel. There are production facilities, warehousing, and logistic facilities.
Space bases, fleet anchorages, space fortresses, training centers, logistic centers, supply dumps, etc
Commercial stations and habitats are destinations, shopping Meccas, pleasure domes, exotic locales, and other destinations based around tourism and economic consumption and materialism.
Research stations tend to be remote to keep outside interference to a minimum and to improve security for said facilities. This includes data archives, storage centers for genetic material, observation stations, and laboratories.
People have to have a place to live and colonial stations and habitats are first a foremost residential structures.
Prisons, black ops and secret bases, retro-tech, religious retreats.