I vote for "ONE PIECE"! The world-building Oda has constructed over more than twenty years is unprecedented. Every island has its own unique culture.
I vote for "Blue Bird" from Naruto; it gives me goosebumps every time I listen to it.
Kanehito Yamada's storytelling has always been really stable. He's not the kind of author who rushes his work, so I'm very confident about the final chapter.
You need to be very careful when choosing second-hand figures... some issues like aging and yellowing are not easy to see with the naked eye. I suggest bringing a flashlight to inspect the goods.
I miss the tension from the U-20 arc; the current enemies are too overpowered.
I'd recommend Attack on Titan. Even non-anime fans would be drawn to that story, because the theme is universal enough.
As a manga fanatic, I think manga storyboarding is a unique form of art. Sometimes, after being adapted into anime, it loses the impact of the original panels. Berserk is the best example of this.
The moment the truth about the Void Century was revealed, I really got goosebumps! Oda is the king of foreshadowing!
ONE PIECE taught me the true meaning of friendship. Luffy's attitude towards his crew has always been my guide for interpersonal relationships.
It's such a pity about 《Ayashimon》! Yuji Kaku's art style and world-building were very unique; it was just a pacing issue. If he had been given ten more chapters, it would have been a different story.