Peaches and cream: loved this one! Greek yogurt, peaches, cream, and sugar. It would probably be creamy enough without the cream. After food processing, I added in additional diced peaches.
Pineapple: very refreshing. I also tried this one with pineapple and coconut milk, but the balance of flavors did not come out quite right.
Watermelon stripe: because I cannot resist a stripe. Frozen watermelon tastes just like watermelon. I actually prefer fresh watermelon if it is plain, but think that watermelon lime or watermelon mint might be nice.
Lemon creamsicle: this one was great! Greek yogurt and lemon curd.