In my opinion you cant beat a classic, and what can be more classic than the legendary Seinfeld anime Intro?
(yes I know this oldmeme is pure cancer. blow me i still like it)
Ok now we got that out the way, honestly im not that big a weeb since there is only like a half dozen anime I have ever properly watched and liked (Berserk, Madoka, FMA Brotherhood, Dragonball, Made in Abyss) so im just gonna draw a few examples from them and give reasons.
1. DBZ - OCEAN DUB INTRO - THE FIRST
Ok this is literally only for nostalgia sakes. the ocean dub sucked balls and everybody knows it, but this was my first anime and this is literally the first anime intro i ever saw so it gets a point for fond memories before I developed a sense of cringe
2. FMA BROTHERHOOD - INTRO NO.4 - THE MOST COMPLETE
Out of all the anime I have ever watched and liked, FMA brotherhood is the only one that was lucky enough to have a proper and satisfying conclusion with Made in Abyss still just beginning, Dragonball still lookin like its gonna keep on going, Madoka seemingly dead after Rebellion (goddamn it Homura ) and the Berserk anime (GODFUCKINGDAMNIT GRIFFITH)...hoooboy we will get to that. Of all its intros, this one is the one I remember most and thus its my entry for that animee.
3. MADE IN ABYSS/MADOKA - BASIC INTRO - THE SETUP FOR A GUT PUNCH
Putting these two together for one simple reason. They prepare your expectations (i.e. a cute magical girl anime/awesome fantasy adventure) for the axeblow to come. In case you havent seen them I wont spoil anything, but these intros and the lyrics/visuals respectively become all the more relevent once you watch the series and know the subtext.
4. BERSERK - FINALE END CREDITS - THE FUCK YOU 9 YEAR OLD JUDGE HOLDEN. ENJOY A LIFE OF MISERY YOU CUNT
Yeaaaaaaah....again not gonna spoil shit and this outro is as generic and uninteresting as it gets, but what it represents is nothing short of the first time I was straight up stabbed in the heart by a storyline which was then compounded by the storyline immediately ending and leaving me...9 years old and with no internet at the time...with no way of seeing it resolved in any way shape or form, thus leaving me thinking that what had been my favourite animated series ever had ended in the most soulcrushingly sad and cruel and rage inducing way possible. I waited for literally 6 years before i could get a continuation of the story in manga form, and even to this day nearly 20 years after seeing this outro for the first time I am still completely hooked to the point where the manga's massive plot development earlier this year might have had me slightly misty eyed.