Definitely post-TS, although, it was also the moment I've become a weekly reader, as I started reading One Piece around the time the break started.
Pre-TS I only kinda disliked Skypea, it felt a bit overstretched to me, but most of the islands were really cool.
Sabaody was cool, although I absolutely hated what Oda made of Sanji, I always liked him as a cool smart guy with "Mr Prince" and "Hunter" moments, as well as a unique fighting style, and instead, I got a bloody horny mess instead of my beloved character, like wtf, it's not funny, it's just annoying and sad.
Fishman Island was kinda like Avatar movies to me, pretty but meh in terms of story, albeit the Jinbe-Luffy moment was great (when Jinbe donated blood), and I also remember Big Meme and Pudding reveal, that had me hyped, how naive I was...
Punk Hazard was mostly OK for me, I liked Law's reintroduction, and it was funny how he switched SH to different bodies.
Dressrosa is horrible on a weekly read, at some point I had arc fatigue and was thinking of dropping the series for some time so that I don't have to wait in agony. I also wasn't too thrilled that Robin got robbed of a good fight, and with so many characters half of SH had to get away (noooooooo) and even though I understand why so many characters were introduced, and why Luffy needed a fleet, I still am so tired of that arc that I never got to fully re-read it (I just re-read some bits here and there, and I must admit it's a lot better on a re-read, plus Doffy was a cool villain with an interesting backstory & ties to Law).
Zou was really cool, I was hyped for lore and upcoming Sanji storyline (oh how naive I was x 2), it was short & sweet!
Now WCI, it was a wild mix of horrible and amazing, interesting concept and theme, but an underwhelming main villain, a lot of characters were a mess, I love and hate Pudding at the same time, I hate that Sanji was robbed of a cool fight and had to bake that stupid cake that achieved nothing.... but I really liked a lot of moments as well, Pedro's death was really emotional, I surprisingly warmed up towards Bege and his crew (previously he was one of my least favourite supernovas), Brook was an absolute MVP, and Carrot's sulong reveal was amazing as well. So it had its ups and downs.
Levely/Reverie was way too short for me to consider it an arc, but it was hype and I wanted more.
And then the crown jewel of disappointment, Wano. Almost 150 chapters of Oden's wank, I'm still salty as fuck as I was really looking forward to SH being united after so many years apart, and then we got.. that. To focus on the positive, I kinda liked Roger in flashbacks, and the initial Roof Piece with 5 vs 2 was cool, I'd prefer if it ended that way, but we got what we got. And I'm now in Stussy4nakama therapy group after that "I wanna see the world" "nah, changed my mind" Yamato disappointment.
Egghead is amazing so far, I keep my fingers crossed, maybe as soon as all Oden-related characters disappeared from the main story the curse was lifted and we'll get cool stuff again.
Sorry for a long rant, I didn't mean to ramble, but it was good to remember some good moments even in the worst arcs, so thanks for tagging me and asking for my opinion :cheers: