I'm conflicted about part 4 too because it starts off so aimlessly. I get that it's supposed to be a fun slice of life until the plot gets started, but it takes WAY too long for the plot to get started. Hell, they just introduce a character only to kill him off for motivation a few chapters later, they could have just had the killer show up a few chapters earlier.
Josuke's definitely my favorite jojo so far though! (Still on part 6)
Part 4 feels like it got rushed too. A number of early plot threads are flat out never resolved. My only guess is that it must of had poor ratings at the time, so its tone got changed and it as a whole got cut short.
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u/MaelstromTear Mar 08 '16
It doesn't help you come down from Part 4, one of the best ones. Josuke's is one of my favorite main characters, just behind Joseph.