Did you know that there's an avocado you can eat like an apple? The skin is thin and edible. There's another avocado with much higher oil content than the Hass and so a different mouth feel. Another kind that has a smokey flavor, and avocados that weren't fertilized by insects and so they have no seed - just a solid fatty oily avocado. And many more...
This is one of the things I miss about CA (specifically, I lived in Ventura, CA). (another is the huge variety of citrus, including a strain where they breed the acidity out of an orange and so it tasted like vanilla...)
http://edibleojai.com/online-magazine/heritage-avocados/
(the one in the lower left looks like the edible skin one I remember)
And a small list of CA varieties: http://ucavo.ucr.edu/avocadovarieties/VarietyFrame.html#Anch...
There's even more varieties in Hawaii.