Milk of choice (I often use vanilla rice milk, or hemp milk, less often soy milk), frozen berries (this makes it cool enough to not use ice, which I think just waters down the flavor, and actually makes it too cold for my multiple crowns), I prefer a combo of blueberries and strawberries, scoop of protein powder.
Other options (some are better for earlier in the day, as they add too many calories for night):
spoonful of pb (good with frozen bananas---I know you say you don't like bananas, but have you tried freezing really ripe bananas, peeled, and adding them to a smoothie?)
spoonful of coconut butter/oil
spoonful of ground flax
spoonful of maca powder
spoonful of mesquite powder (adds nutrition and a slightly molasses flaor as well as sweetness)
agave nectar or stevia for sweetness
