How was that? Not much fun? What happened to your excitement and joy? Did you start doubting yourself, thinking that you really must be stupid? And definitely wrong?
Just because someone else doesn't get it, doesn't mean you don't. What if you knew a whole lot more than most people?
At least you know what's fun for you. How would anyone else know that? So when you are enjoying yourself or have a great new idea, remind yourself you know that you know. And say “Just for me, just for fun, never tell anyone.”
And if you do share your joy with someone and they don't get it, smile and thank them for their “interesting point of view.”