I'm gonna weeb out bc all my favourite media is either animated, japanese or both, sorry. End of Evangelion is such an amazing movie oh my god, especially the very end the song has so much meaning through the movie and to me personally, plus the imagery is so beautiful and it wraps up the character archs pretty well.
Perfect blue is another favourite of mine its just a solid murder mystery with amazing subtext and visual representations of DID and some other brutal stuff, its animated pretty well too some of the gory fight(?) scenes have good impact and are pretty unnerving. (you can find the whole thing on youtube easy if your interested)
I also just watched to K-on movie which is like very weird for me to watch something like that considering my tastes and that its a cute girl slice of life thing which i have a disposition towards, but i got attatched to the characters during the show and the end of the movie made me tear up the chorus kills me.
Could only find this in spanish for some reason