I chose 3 Spot mainly because those are what I have and I like them though there are many other interesting Gourami. Once I keep some of them I may change my mind.
I like dwarf goerami's most, the wild type fish.
The ones that are bred for a certain color (red or blue) usually aren't as pretty (color as well as body shape) as the fish with the original colors. But this is my opinion.