Oh yeah, it's crazy-long. At least it's not all about the same people: it's broken down into (thus far) seven parts, each one focusing on a different member of the Joestar bloodline, all of whose names can be shortened down to 'Jojo'. (Jonathan Joestar was first, set in the 1800s, followed by his grandson Joseph Joestar, followed by his grandson, Jotaro Kujo, followed by Jotaro's younger-than-him uncle, Josuke Higashikata, followed by villain Dio's son, conceived when Dio was possessing Jonathan Joestar's body, and then in Stone Ocean it's Jolyne Kujo, Jotaro's daughter)

So it's really several different stories, but all connected and all extremely inventive. In Jojo's Bizarre Adventure, tHe answer to the question 'What Kind Of Lame Power Is Heart, Anyway is, invariably, 'the kind that can kill you'.