Greek / Cretan Avocado Variety T2. Avocados can be eaten raw, but are also commonly used in foods such as guacamole. There are many different types of avocados that vary in color, size and shape. Avocados are usually pear round and come in many different shades of green, ranging from light green to almost black when fully ripe. Their carotenoids are well absorbed and easily assimilated by humans due to their high fat content. The most popular type is called Hass avocado, which is round with black skin. Nutritionists warmly support the beneficial benefits that avocados offer to humans!