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Even though anime has made its way into the mainstream over the past few years, negative notions about the medium persist.
With the exception of a few mature animated comedies (some of which are fantastic and thematically complex, like Bojack Horseman), animation in the US is still typically viewed as a medium for children. The idea that cartoons are kid sh*t, while perhaps understandable for someone who has only ever been exposed to Western media, is ignorant of the broad range of animation in other cultures.
In a similar vein, a lot of people insist that they just can't get into anime, or they stigmatize all of it because they don't like the "schoolgirl stuff." But it's important to remember that anime isn't a genre–It's a medium.
Individual anime series fall into every genre under the sun, just like movies and live-action TV shows. Saying you don't like anime because of the schoolgirl stuff (which is a very valid thing to dislike) is kind of like saying you don't like movies because of slasher films. You're writing off an entire medium of art over a genre that you can easily avoid.
So let's say you are open to watching anime, but aren't quite sure where to start. Or, more likely, maybe you already love anime and you're trying to find a series to convince your SO that the $200 action figure in your room was a totally reasonable thing to buy (it was, and your life choices are perfect). Just check out any of these gateway anime series that serve as perfect entry points into the medium's diverse offerings.
Yes, Naruto is very long and arguably bloated even if you skip all the filler. But there's also a reason that Naruto was the gateway anime of choice for pretty much every young weeb-to-be growing up in the early 2000s. Naruto is a ridiculously accessible series mainly because it's protagonist, the young ninja Naruto Uzumaki, is so immediately relatable to anyone who has ever felt like they don't fit in.
Throughout the series, we watch Naruto grow from a young boy who acts out to mask his pain and loneliness into a responsible man capable of leading his village. Watching through Naruto is a big time commitment, and it's not perfect, but if you're looking to get immersed in anime, tropes and all, it's a great place to start.