My Own Cactus & Succulent

This time I would like to show you guys some of the cacti that I've repot recently. Some of these was bought during vacation on Cameron Highland last year. Actually I don't really know what their  names are and how to propagate them succesfully since I'm new in collecting all of this cactus and succulents. Anyway below are the cactus that I was talking about. Quite unique isn't it?!