Always always a tart yogurt, plus strawberries and mochi. Nothing else, nothing less.
Pinkberry just phased out their seasonal Watermelon tart yogurt and it made me want to cry. It was seriously the best tart flavor I've ever had. They replaced it with pomegranate and mango which aren't nearly as good.
I have frozen yogurt about once a week, sometimes twice. It's my favorite.