I enjoy a lot of anime, by no means would I call myself super knowledgeable but gun to my head, Ghibli aside, I think I can only recommend a handful of things to people who have a neutral or negative opinion on it. I think the affectations of even stuff like Deathnote, Monster, Paranoia Agent or Attack on Titan can be pretty off putting. My main reason for watching aside from beautiful visuals is that the scenarios and thought experiments can be fascinating. I’ll admit stuff like Demon Slayer seems a little silly and I don’t get it. Went to a convention with my girlfriend, who tends to like cuter stuff, and was surprised by how popular it is.
Ghost in the Shell (original), most of Cowboy Bebop, Perfect Blue, Angel’s Egg, Memories and a few others I can recommend without reservation. No surprise, most of them are older. And I agree Japan has a rich history of great, more adult oriented stories and more sophisticated animation and it’s harder and harder to find that stuff. Maybe the larger cultural trend towards immaturity is a global thing, in response to all the doom and gloom elsewhere. But I’m glad to see super hero movies dying out in the US - Barbie and Opppenheimer doing well hopefully green lights different kinds of stories.