I'm 21 and I still watch some of the cartoons I enjoyed as a kid occasionally - like The New Adventures of Winnie the Pooh and Dragontales. I also like 80s cartoons, like Pound Puppies (and I gotta tell ya, the first season of 1980s Pound Puppies was downright hilarious in some episodes) Gen 1 My Little Pony, and of course, I watch Gen 4 MLP sometimes, too. I also like the really old school cartoons from the 1930s and 40s, like Popeye, Betty Boop, and Fleischer cartoons. When I was a teenager, I really liked the Craig McCracken cartoon Foster's Home for Imaginary Friends, too.
I watch episodes of South Park online, and I like Family Guy and King of the Hill, too, but I don't get to watch the latter two as much as I used to.
My stepfather didn't like how I was still watching PBS Kids cartoons/shows well into my teens, but I actually think they did me some good...PBS shows like Dragontales, Sesame Street, and Anne of Green Gables: The Animated Series sort of taught me social skills in the areas which I faltered. Even as an adult, I find the show My Little Pony: Friendship is Magic helpful in this regard. If any future kid of mine wants to watch cartoons well past a certain age, well then, I won't stand in their way.
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I wish Sterling Holloway narrated my life.
"IT'S NOT FAIR!" "Life isn't fair, Calvin." "I know, but why isn't it ever unfair in MY favor?" ~ from Calvin and Hobbes