I haven't finished Attack on Titan, I'm on the final season, but I'm already missing it.
Can someone please recomend me some animes, or animation in general, with psychologically rich and deep characters, with some philosophical questions as well?
I've already seen FullMetal Alchemist.
If you’re looking for something a little more standard, I’d recommended Death Note. Lots of mind games and cat-and-mouse type stuff.
If it’s something similar in tone to that but a little more laid back, playful, thoughtful and philosophical, try Death Parade. I’m only a few episodes in so far, but I’ve been really enjoying it.
If you want something even more laid-back, not quite as dark and more slice-of-life, try Haibane Renmei. This one’s a little bit harder to find, but if you can, it’s worth watching. Less narratively driven and more just vibes, but still has stuff to talk about and say.
Want to go more the procedural route? Try Psycho-Pass, particularly season one. I haven’t watched the second season but I’ve heard it’s hot garbo. There’s been some other stuff released after that I haven’t watched it I’m not sure about.
Still want procedural but even more sci-fi, dialogue and pondering, with some action and espionage thrown into the mix? I’d recommend Ghost in the Shell: Stand Alone Complex.
Really want to go into the deep end? Try Neon Genesis Evangelion. Starts as sort of like your typical mecha anime with young teenagers piloting against robots to defend against giant monsters, though those are more of a post-apocalyptic backdrop for a coming-of-age story, some slice-of-life, character exploration and some heavier philosophical and psychological material. Just a bit of warning, it gradually evolves as it goes and does get…let’s just say, the second half gets heavier and reveals some things about its characters and the world they live in that really change the vibe of the show from when it started. If that doesn’t phase you or deter in anyway, however, go right ahead.
Want philosophical, psychological, procedural, thriller, slice-of-life, with some mystery and horror for good measure? Try Monster. I’ve only watched 10+ episodes out of 74, but it’s really good. A bit of a slower burn, but still keeps you invested. It’s on Netflix.
That’s all that comes to mind at the moment. Hope that gives you some good options to choose from.