"Not all succulents are cacti, but most cacti are succulents." - Me

Unique characteristics: Relatively easy to grow.  Some can tolerate light freezes, but it is better to keep temperatures above 50F/10C. 

Watering: Rainwater, reverse osmosis (RO), distilled, or well or tap should be fine. Water after media is completely dry. Succulents require more frequent waterings when actively growing. 

Light: Bright light, e.g. south facing window or under strong LED lights.

Potting Media: well-draining, cactus mix or general potting media  mixed with perlite, vermiculite, or sand.

Feeding: Fertilizer monthly when actively growing, following product guidelines.