Thanks for answering Kristi. I will now know how to root prune when the plants get too root bound, what time of year do you suggest the pruning is best done? I looked up your H. ovation and they are very pretty.
The Hoya I was given, I think is H. carnosa, krimson queen, that's what (plantladylin) Lin thinks it is, it has a peduncle with buds so maybe when it blooms

it will be a more positive id. The other one my DH gave me for Valentine's Day, there was not much information other than 'Hoya E', so after a lot of searching the only thing I could find with that kind of foliage, cream in the center and green on the outside of the leaves, was H carnosa exotica.