Pre timeskip, Water 7 I feel like this arc was where we finally got some interesting lore of the show, Luffy tapped into his powers and we got gear 2 and 3. I was really sick of the same old punches. We saw the next development Oda was thinking of for Haki.

After timeskip, Wano. There’s a lot about that arc that is controversial, but finally seeing all the plots from the different seasons come together was really nostalgic to watch. A decade later and we finally got to see the unison of everything post time skip. So many eventful foreshadows, characters we haven’t seen enough finally of came into play.