I think I would rather pistachio out of these three.
I love vanilla but often it is quite tasteless.
Vanilla is lovely in Europe but over here it is not as good for some reason, and so I rarely order it as there are too many other chocolate ones tempting me.
I would defiantly have the pistachio! I always go for the most unusual ice-cream an ice-cream parlour might serve. On most cruse ships they serve free ice-cream between a certain time, each day. I try 1 flavour I havenít had before. Some of the cruise lines make their ice-cream on board. Apart from the cruises, I rarely eat ice-cream.