MY take-away? A lot of people have never been exposed to anything but chocolate, vanilla, and strawberry - because those are supposedly the "most popular," they're also the most available and prevalent. Then, they become cheaper (supply and demand), and eventually they are the familiar and comforting metaphor for summer and childhood.
Thank GOD my dad loved pistachio and my mom liked things like "turtle pie" or "rocky road" with chunks of stuff in it, and in all things culinary, I was encouraged to try the new, odd, different, even adventurous. I'll try anything once, provided I'm fairly sure it CAN'T kill me.