It took me only a few days to read the entirety of Jojo's Bizarre Adventure Part Seven: Steel Ball Run. For context, this is the longest part in all of JoJo. Not only that, it's the obvious best. It took me a few days to write this review because I couldn't figure out how to explain why this part is so good. Honestly, it's miles above every other part. I know it's difficult to believe, but hear me out.
The part is overall very different. It's not the episodic stand battles we've known to love since part three. There are stand battles, but the story is more straight forward. The stands this time around really aren't ghosts that fight for the characters. They're powers that the characters obtain and find out more about as the story goes on. The ghosts aren't as important this time around. For example, Johnny Joestar's stand is the ability to shoot his fingernails like bullets. Gyro Zeppeli's power comes from a steel ball that he uses. I think it offers for more interesting fights.
The two main characters, Gyro Zeppeli and Johnny Joestar are two of my favorites characters of all time. Never before in JoJo have I ever been more invested in character arcs like I was in this one. Both of them are not only fascinating character studies, but entertaining to watch. Their dialogue together is the absolute best in the series. They talk like real people that I could relate to. But, they aren't even the best characters. Normally, I'd say the villain is the best character. And, yeah, Funny Valentine is the best villain in JoJo and probably my favorite villain of all time. He lacks a certain coolness factor from Diavolo, but he gives off this threatening presence every time he shows up. Not only that, he's such an interesting character to listen to. The backstory of his life is tragic in a way that clearly affects him in the present. His motivations for what he does are clear in a way that the reader can understand. He can drive a reader insane thinking about how he could be right or how he obviously believes himself to be right. Even the main characters question whether or not they're the villains. Only JoJo can make a villain this god damn good.
But despite how great the villain is and the main characters, they aren't my favorite character. My favorite character, not only is this part but one of my favorites in all of manga, is Lucy Steel. From the moment she appeared, I knew she was a fascinating character, she ended up getting a ton of screentime and I got so attached to her character and there were so many moments where I fear for what would happen to her.
That's another thing about this part, pure investment. I was so invested in the story, the characters, the conversations, the fights. It has all the coolness of other JoJo parts amped up to eleven, some of the best character dialogue I've ever read, one of the best stories of all time, my favorite power/fighting system ever, and a great mixture of intense fights and fun fights. This is my favorite part of JoJo by a massive amount.

I have no qualms saying that this is the greatest thing I've read from Japan.