Hi Stush,
Here are my loves: Stapelia, Orbea, Huernia, Caralluma, Ceropegia,. Angolluma, Tavaresia and Hoodia. Except Stapelia gigantea (its just way too big!). BTW, why has the Catalog of Life moved Stapelia gigantea to Ceropegia? The Plant List still has it as Stapelia.
My little H. quinta started to grow and then just gave up.
What I've got:
Duvalia vestita
Huernia primulina
Huernia zebrina
Orbea semitubiflora
Echid. cereiformis