My lesson can be expressed from this quote by Chronicles of Narnia writer C.S. Lewis.
"Critics who treat adult as a term of approval, instead of as a merely descriptive term, cannot be adult themselves. To be concerned about being grown up, to admire the grown up because it is grown up, to blush at the suspicion of being childish; these things are the marks of childhood and adolescence. And in childhood and adolescence they are, in moderation, healthy symptoms. Young things ought to want to grow. But to carry on into middle life or even into early manhood this concern about being adult is a mark of really arrested development. When I was ten, I read fairy tales in secret and would have been ashamed if I had been found doing so. Now that I am fifty I read them openly. When I became a man I put away childish things, including the fear of childishness and the desire to be very grown up. "
Edit: What I mean by this is, don't let people's perception of what you are into, especially if it is supposed to be something that you're "too old" for, discourage you from being into it. I will love Pokemon until the day I die, as well as other things from my childhood, and nothing anyone can say will cause me to compromise on it just to appease to them.