There are also hypomelanistic [ hypo ] [ very common ]and transluscent [ becoming more common ] Dunner's are still a newer morph as well as the zero and Witblit ....those are still very uncommon. A silkie is just the super form of the leatherback, and can only be produced by mating 2 leatherbacks.
Personality varies in all of them, no one morph is friendlier, but some are hardier than others.