The best thing about smoothies is they are so versatile to use with any type of fruits you'd like – frozen or fresh. Berries such as raspberries or blueberries are the obvious choice. Mango, banana, pineapple are also worth a try if you're looking for a more tropical-themed beverage. (Note that banana smoothies are best consumed straight away, because storing them for too long can lead to browning). Some also like to add greens to their smoothies such as spinach or kale for that nutrition boost. You can also add a dollop of nut butter to your mixture for a variety of taste.