The nice thing about miniatures is that they don't take up much space (which is especially nice if growing indoors with limited space).
One drawback with miniatures: the "mini" in "atures" truly applies to some of the flowers they produce. You almost have to pull out a magnifying glass... having a camera with good macro options really does comes in handy for taking photos.
Although I enjoy the flowers, I enjoy the foliage even more (texture, shape, form, and the different color hues). One problem I experience (with growing orchids in terrariums) is the occasional fungus gnat. Pings really help with that problem, so I try to incorporate one (or a couple) into my set- ups.
I like
Tillandsia a lot (for the same reasons as miniature orchids). Another plant that does not take up much space.
20"L x 16"W x 20"H