Legend of the Condor Hero (Anime ver.) I guess, even when I was a kid, I was into Chinese martial arts tragic love story schticks.
Every single time there just certain scenes that give me chills. Whether it be the scene in the first episode where The servants are summoned, or Saber and Kiritsugu's Ideology Clash or the scene at the end of Episode 23 where Kirei recites Psalm 23:5 as they show the final battles of the grail war. Despite the fact that the word is overused, I cant help describe Fate/Zero as "epic" in many areas which is what draws me back to rewatch many of its scenes. This show is what i'd expect from a concept like the Holy Grail War.
same, king. Also I should be ashamed of this answer but I rewatched SAO like 3 times when I was a kid. Yeah... lol. I watched Your Name five or six times already though.
It's RE: Life. Although not my favorite anime, for some reason it is my most watched one. I think I've watched it about 7 or 8 times already and now that I'm typing this I feel like it's been a while and want to watch it again.