Kenyi and Demasoni are now Metriaclima species, but in old time, many vertically barring Mbuna are classified under Pseudotropheus. IME, Demasoni is as territorial as kenyi, just half the size. I once confined a male Demasoni briefly in a breeding cage and he attacked the reflection. Mbuna is not considered to have personality because they are small fish typically kept in large group in small home aquarium. No one does it, but keep a solo Mbuna in a betta tank and you will be surprised that some territorial male might turned into a mini glass banger. Many CA have personality because home aquarium are typically too small for one fish territory. Keep a group of CA in a huge tank and they will lose their personality.Personable is defined as having a pleasant appearance and manner.
I don't find Metriaclima or demasoni to be super aggressive when housed in the right sized tank with the right tank mates. Never kept kenyi or Melanochromis, I don't like aggressive fish.
That's not correct. C. demasoni is not and was never a Metriaclima/Maylandia. It went straight from Pseudotropheus to Chindongo.[...]and Demasoni are now Metriaclima species [...]