It's fun when flowers happen that you don't see coming. Even better are the flowers that you didn't see coming and had never seen before.
I've had Kohleria 'Queen Victoria' since May 2011, and it has not always been clear, in the two years since, that I was going to continue to have it much longer. My watering frequency is not quite often enough to handle some of the needier gesneriads. But it's been coming back in a big way since a repotting (last summer? fall?), and I honestly had no idea that it was even thinking about blooming. I just happened to glance over at the shelf in my office, saw what I thought was an unusually large Episcia flower, and then realized -- that was no Episcia.
So this is fun. I don't think they're self-fertile, so I won't have seedlings or anything, but it's new, and pleasant.