Strange ways of choosing orchids to buy?

[Optimist]

Hi, I realized that I am the kind of person who learns from past mistakes, and yet, uses past successes to a nearly superstitious level. I have a dendrobium C. K. Ai. "Aka" X Caniliculatum that I have gotten the care down pat. It is a water hog even though lots of care instructions seem to say otherwise. So I just bought Dendrobium blue twinkle, which is another Caniliculatum cross. (Betty Goto x canaliculatum). I am not sure why I think that if I have one Canaliculatum cross care perfect, perhaps I will do well with another one. This is similar to the way I chose my other orchids. If I think I have done well on one, I will choose another that has some similarities.