I think my favorite part of Part 4 had been how much it grew on me. I watched the first few episodes not really digging it. I didn't like the change of tone from a world-wide trip to a single Japanese town. Josuke wasn't too interesting to me and there wasn't much I was coming back for. I was mainly watching it because hey, it's Jojo.
Now Part 4 is my second favorite part out of the first four. I'm glad I stuck with it and Kira is of course an amazing villian. I'm glad that Josuke was more than just a street punk and wasn't just a gimmick of "insult my hair?!
dorararararara!!" And Morioh has grown on me even though I still would prefer a more interesting setting. Can't wait to see all of Jojo animated.