>>I'm a big fan of the "string of" plants: string of pearls, string of turtles, string of frogs, you name it.<<

I like those too. I have a string of pearls, couldn't afford to get the turtles too but will watch for it at future events.

I like plants that propagate themselves. I have some spider plants and a couple of different kalanchoes.

I've just planted some mulberries to see if they'll sprout from the fruit. I found a sapling with big sweet berries and I'd love to encourage that. The yard is full of mulberries, variable in size and quality.