Thanks for mentioning that, Hetty. I had blanked on the name of mine earlier, but it is Kalanchoe daigremontiana. They drop plantlets like it's going out of style, but don't seem very inclined to bloom.
They grew better for me with more light (I've moved a few times with them, so they've had a south-facing window and a west-facing sunroom), but right now, the north-facing window is the best I can offer. They'll get more light whenever I move again
But since they never bloomed in the other situations either, I think it has to do with the particular species/variety.