This page has a list of all the personalities found in Animal Crossing series. However, the official names have not yet fully been discovered. Inspecting the file structure of Wild World, New Leaf, and Pocket Camp has revealed these personality types in filenames, interpretations of what these stand for are provided after the hyphen:
bo- bonyari (known as lazy)
fu- futsuu (known as normal)
ge- genki (known as peppy)
ha- hakihaki (known as jock)
These are abbreviations for the Japanese personality names. Checking the abbreviations indicate that they do indeed match up, for example, the
ge directory matches up with the personality of a peppy villager, and a likely conclusion to be drawn is that the
ge stands for genki.