Until recently, all I had kept were the Pachyneuriums. I had seen some spectacular specimens while on vacation. I find the palmate ones interesting as well.
I wouldn't mind keeping two or three of the Cardiolonchium. And since I have already placed myself outside of the camp, I don't find there isn't enough variation in them either. I would purchase one for a reasonable price if it came along. I don't grow plants to please anyone but myself. And I'm on that soapbox for people selling single node cuttings. It's sad seeing people fall for it. But, free will.