I have a nutribullet and it's one of the best things I have ever bought. I do daily synthepure fruit/green smoothies. I usually add in 2 tablespoons of oats to most shakes now too. Synthepure is ideal as it's natural flavour so doesn't mess up with the taste of the fruit smoothies. Egg whites are great too if you use them. I sometimes add in certain nuts for the fat content and to make the shakes creamier. Recently I have started adding in almond milk to for the sweetness. My most common shakes are...
Synthepure, pineapple, squeeze of lemon and maybe a little water.
Synthepure, 1-2 apples, variety of berries (blueberries, raspberries, blackberries) and some water.
Synthepure, strawberries, 1 banana and some milk.
I also regularly use mangos, white grapes, spinach, clementines, oranges, cashews and walnuts.
The only fruit that isn't that good is kiwi as it can taste very bitter when blended. Most others are great though.