What is the best plant to use for a Floranium?

One most frequently asked questions is: What is the best plant I should
use to connect my Floranium to. I always answer: Find out yourself,
experiment, try different plants, watch them, make notes and let the
community know, what you discovered. Every plant reacts a little bit
different. Some plants let the Floranium flicker like crazy, others
barely change the color at all. A couple of months ago, I visited Ken at
the Plant Peddler in Portland OR to introduce Floranium. Ken knows
plants! I asked him for the most alive and aggressive plant he has, and
he brought a Hoya Carnosa (picture). The Floranium I connected went
almost crazy. The colors changed rapidly like I have never seen before.
After more than an hour, the light transitions would slowed down a
little. In addition, the leafs of a Hoya plant seem to be more exceptive
to the conductive paste than some other plants.