In summary, I found Hass, Carmen, Pinkerton, Sharwil, and Greengold to be equally good. Sharwil didn't have the nutty flavor of the others but made up for it with its buttery smoothness. I liked Nabal, too, but it could have used a little more time on the tree to develop more oil to bring out its full potential. All of the above I'd rank a little higher than Fuerte. I have one other avocado, Gwen, that's still hard but with soft spots, and I fear it may not ripen properly. (Gwen's a Hass seedling.) It was an adventure, tasting all these varieties.