Zamioculcas has broad outgoing branches with elliptical leathery dark green glossy leaves, it is an asset to any interior.
Crassula is a very strong succulent plant. It has shiny small stubby leaves that sometimes have a red edge. The wild look gives a tough look.
The Christmas cactus is a sparkling bloomer, has flat leaves with curved spines and naturally blooms in winter. Then the Christmas cactus produces purple, red, white, pink flowers. So there is a good chance that you will enjoy its colors around Christmas.