Absolutely everything up until just before Kitsis Hyperborea was among the best games I've ever played. (As soon as Meteion changes colors, it feels like a different writing team took over, one completely unconcerned with basic logic or people acting in-character. Or possibly just one that was given one week to finish the game, since it was already delayed.)

I'd actually put Thavnair as the high point. The atmosphere, setting and music were amazing - I don't think I've ever seen fantasy India done this well, or really pretty much at all. And it managed to contain both the expansion's most humorous and most emotional moments.
Going to Garlemald with so many of our old friends was a close second, especially since I had done a complete New Game Plus in the final months of Shadowbringers. It wasn't the story I was expecting from there - we never got to see the Empire actually functioning, or to take Gaius, Cid or Nero there! - but it's probably the most memorable part of the expansion as a whole. Despite the immense hate it somehow got, Into The Cold was a definite high point.

Sharlayan and the Moon were pretty good too, don't get me wrong. And I might have even put the first 80% of Elpis at #1, if it didn't lead up to the entire story unraveling and leaving a bad taste in my mouth.

For the post-6.0 stuff, I'm really excited to go to the Void, and to see what the deal with the Golbez Guy is. (Zenos's avatar ... less so ...) And to see what the real deal with the Twelve is going to turn out to be!
Oh. And to be allowed, in the Omega questline, for my WoL to voice the apparently extremely controversial opinion that "Genocide is Always Wrong and Unforgivable", which she's been prevented from doing in-character an astounding number of times over the course of FF14.

So, yeah. I loved everything except for what was supposed to be the climax and point of the story, basically.