Pear, Avocado & Ginger Thickie Smoothie

I tried this recipe today, wanting to find a good way to use avocado in a smoothie. My initial reaction to it was that it was pretty mild and pleasant, refreshing with the ginger and orange coming through quite subtly, and creamy with a little hint of sweetness. I tasted the brown rice milk separately and really liked it: tasted rather like rice cereal, sweet and with that very definite rice taste. The avocado began to react with the ginger after a few minutes however, making the smoothie taste a little bitter. I do find this is always an issue with avocado in smoothies, it becomes quite strong tasting and can make the smoothie a little bit bitter. I tried to remedy this by adding a date and some spinach (as I love date, spinach, pear and ginger smoothies). This helped a bit, but the bitterness began to come through even stronger after another few minutes. I didn't like it. and ended up only drinking the rest so as not to waste it. I think I'll just use the yummy avocado in food and s