1. They are easy to propagate, in a variety of ways: Stem cuttings, single leaf, and seeds.
2. They come in a variety of foliage colors and types: Green, red, gold, and purple; variegated or plain; needle-like, flat, or rounded; shiny, matte, or glaucous.
3. They have a variety of growth habits: Upright, creeping, and trailing, with leaves in clumps, clusters, or rosettes.
Sedum morganianum 'Burrito'
4. They have a variety of flower colors: Yellows, purples, and pinks--both dark and light.
5. There are tender species and hardy species, so I can enjoy Sedums both indoors and out.
Sedums in my outdoor garden: The red-leaved plant is Sedum spurium 'Dragon's Blood;' the low growing plant with yellow flowers is Sedum kamtschaticum, I believe; and the upright plant with the yellow flowers is Sedum reflexum. These were all grown from a package of mixed seed. I had to identify these on my own, so consider all IDs tentative.