You only have to take a cursory look at fandom culture to realize that a lot of people take animated kids' TV pretty damn seriously, even when they stop being kids. There's something about the combination of coming of age tales with great art that keeps viewers hooked, no matter the age group.
One show that may almost singlehandedly be responsible for this is Avatar: The Last Airbender. Long before the time of headcanons and Stan Twitter arguments, this classic fantasy series has been adored by multiple generations of kids and adults for its host of lovable characters and completely entrancing storytelling.
You don't have to be a diehard anime fan to enjoy the timeless themes of Avatar, but it helps to have your facts straight about the show before you dive in to this pile of reference-laden memes. Maybe it's time to plan a rewatch of every season, just in case.