That's putting the cart before the horse.

Rather you should love things that fit your age and cognitive and culture development. I'd loved ice cream for breakfast and sunday morning cartoons too at 8. I'd have an infantilism problem if I still loved them at 40.

If you still watch teletubbies at 40 and are excited desipite of your age, I'm genuinely sorry for you.

Slightly less so if you are genuinely excited about superheror movies, but still sorry.