I have fallen in love with fruit smoothies. What's your favorite kind of fruit smoothie?

Lately I've been doing a mix of strawberry, banana, pineapple and mango, but this morning I went for just pineapple and mango and it is so wonderfully delicious. I used to use milk to add in, but I recently discovered vanilla almond milk and it has made everything exponentially better. Has anyone tried yogurt instead as a liquid base? I think that will be my next experiment.

I've never gone so far as to add spinach or avocado or ginger or flax seeds or anything outside the realm of fruit (inb4 avocado is a fruit, can it nerds). Does anyone else do this? How does the flavor turn out?