I started collecting in earnest about 6 months ago. A lot of these are cuttings I took but I've bought tons too. I like the clean look of one plant per pot with the pebble mulch but I made some arrangements for Christmas gifts too.
The current count is 79 indoor plants.
I buy it in bags at my local giant mega hardware store (Bunnings). It's actually hydrophobic, making them almost impossible to water from above (i.e. rain). Perfect for my water-shy succies