What is your favorite plot arc in the One Piece series?

Question

Manga or anime--either is fine. Examples include Alabasta, Water 7, Davy Back, Thriller Bark, etc...

Answer 1

I liked the Skypiea Arc.

Enel vs Luffy was an awesome fight.

Davy Back Fight would be my second.

The Foxxy Pirates were great. The whole part made me laugh so hard.

Answer 2

So far the best is Government arc which includes Davy Back fight, Water 7 and Ennies Lobby. I include Davy Back fights on it because it was the start with Aokiji warning them against Robin's dark past. It had the most story driven and plot twist developments that I have ever seen. They were the sole reason for me to continue reading One Piece for the whole 3 or 4 years it took to finish. Oda-sensei did a magnificent job on keeping everyone interested until the end.