I've never had any personal experience with flowerhorns, but I have read the never-ending debates over hybridization on this site and others.
From the pics I've seen, I think flowerhorns are definately beautiful and facinating fish the same way any other cichlid species is. If it wasn't for the fact they are a known hybrid selectively bred by humans, I would've figured them for a natural cichlid species.
The flowerhorn is a perfect example of hybrid vigor, where the hybrid displays the best traits of both contributing species. You get the same vigor when you produce a mule, or a mutt canine. Hybrids that display hybrid vigor are known to be hardier than either of the contributing speices, which is why mutt canines live healthier lives unplaged by congenial defects when compared to purebred strains that are too inbred because they wish to maintain breed standards, thus exhibiting more recessive genetics. Apparently the two species that contribute to the flowerhorn are a lot more genetically similar than the contributing speices to a mule, seeing how breeding flowerhorn to flowerhorn produces fertile offspring whereas breed two mules together get you nada.
Hybridization of cichlid species occures in the wild, especially when cichlid population excedes available space, such as in the African Riff lakes, or during dry season in the Amazon. Wherever populations overlap, you'll get a hybration zone. This is why many scientist like to study what is called a species complex, several species within the same genera that can reproduce themselves, as well as produce fertile offspring with members of the other speices within its genera. From such hybridizations are how new species can come to differanceate themselves, thus providing more evidance towards theorys of evolution.
The two contributing speices to the flowerhorn may very well be very closely related within their natural boundries as well, which is why flowerhorns show vigor instead of regression the way blood parrots show. I'm pretty sure the blood parrots "deformities" would not allow for a wild survival, but then again, why would they need to survive in the wild. Flowerhorns, from what everyone tells me, would have no problem building a nich for itself if every released into the environment.
~~Colesea