I voted for 100% species. The main reason im interested in orchids is because they are the purest demonstration of darwinian evolution. They have specialized to their environment, and vice versa, and are so diverse in their natural habits and traits, that i can see no reason to be into orchids if it were not for the species plants. Species Orchids = Evolution. Hybrid Orchids = Man's f'ing with nature.
I dont mean to knock hybridization - there are a LOT of really pretty hybrids out there, and i even own a few. However, the simple fact is, i could have ended up obsessed with a slew of other things, but Orchids took my passion because of their natural adaptation and specialization abilities. Therefore, i must focus on species plants.