A 20-year-old with childish interests = hate from the public...

[Peter_20]

I'm a guy who really likes to play around with "childish" stuff, and I take it very seriously.
However, none of my acquaintances really share this passion, and that's pretty boring.
My friends are generally much more interested in cars and vehicles, and my parents think it's "unfitting" to spend time with it "because I soon turn 20".
But really, why should I stop spending time with it if it brings me happiness?
I mean, they don't think I should play video games because it's "for kids" (yeah right, Perfect Dark and Resident Evil...?), they start whining whenever I read comics (Donald Duck ftw!) and I'm approached pretty much the same way by everyone around me.
I think this is very sad, I shouldn't have to adapt to their prejudiced views or anything; I'm an individual, I like childish stuff, they don't, alright, but they should at least shut up almost it!