The 2nd part of S1, eps. 14 through 26 from Jojo's Bizarre Adventure wore pretty neat(a completely different story line than eps. 1-13).
I'm at S2, Stardust Crusaders out of the currently 3S total, the beginning is not too impressive after the cool 1st season end.
The most troublesome thing with this anime is that main characters keep dyeing, and their grandsons witch are pretty much like themselves continue the story line, 50-80 years in the future but with other people. It's hard to keep getting to know other characters because everyone just dies of old age every half a season or so.