I’m on Summit War arc right now (Marineford), as of right now my least favorite one would have to be East Blue Arc (Arlong Park arc was the best one for me). Only because the story gets better for me as I progress, each arc surpasses the next.

*insert filler arc title here*

(jk)

I'd probably have to say the Sky Island Arc. It's fine, I don't hate it, but it's just kinda 'meh' compared to the rest (but that's based off my own tastes)

Thriller bark feels like a filler to me i dont know but i will admit the appearance of Bartholomew Kuma saved it for me

Skypiea and Alabasta were boring to me

Not counting Foxy's and fillers, to me the worst one is Enies Lobby (no joking).

Why do you think that @Laugh Tale 99 i just dont get it