Imo all of pre-TS was very solid, even the Long Ring Long Land arc (tho I only experienced that one through the anime, which had a lot of filler to flesh it out more).
FMI was the first time that One Piece became slop. The arc was very boring and forgettable, and back then 50 chapters was kinda long for a One Piece arc. Only the last few chapters were good.
The first half of PH was slop. The arc got better when Law joined the action, and became straight up good when Vergo arrived.
Dressosa was pretty enjoyable at most points, despite being kinda slow paced and lasting 100 chapters.
All of Zou was good
All of WCI was good or at least decent, even the wedding cake stuff.
Wano was just straight up garbage and the epitome of slop. Only part I kinda liked was the beginning of Act 3, before it became obvious that the non-M3 SHs were gonna get underwhelming fights and not really amount to much.
Egghead was good until the broadcast, which was slop.
Elbaf has been pretty solid so far. The only part I hate is the Shakky slop
FMI was the first time that One Piece became slop. The arc was very boring and forgettable, and back then 50 chapters was kinda long for a One Piece arc. Only the last few chapters were good.
The first half of PH was slop. The arc got better when Law joined the action, and became straight up good when Vergo arrived.
Dressosa was pretty enjoyable at most points, despite being kinda slow paced and lasting 100 chapters.
All of Zou was good
All of WCI was good or at least decent, even the wedding cake stuff.
Wano was just straight up garbage and the epitome of slop. Only part I kinda liked was the beginning of Act 3, before it became obvious that the non-M3 SHs were gonna get underwhelming fights and not really amount to much.
Egghead was good until the broadcast, which was slop.
Elbaf has been pretty solid so far. The only part I hate is the Shakky slop