Summerset I like the most. Next would be High Isle. Wish we could get more content regarding three banner war instead of "Look, its another end of the world, yet another new cult" boring stuff. But I dont think I will see my Queen ever again in the future.

For me the most enjoyable chapter was Summerset. The last acceptable chapter was Elsweyr. While not as good as Summerset, it was still OK and offered a lot and many hours of game play. All other chapters after that were just cheap and finished in a day or less.For Necrom i needed less than 20 playing hours to complete the zone. For Necrom the only Highlight is the House (Emissary Enclave). What i especially like there is the direct access to the outlaws refuge, the location close to crafting areas, traders and guild traders. Got a bounty to your head, just port to your house, go down to the outlaw refuge, clear it there, flog off everything to the fence. Brilliant. And finally a house that offers you some clean space outside to expand and even inside you have enough space.

Morrowind, with Summerset being close second.

It's true, the writing has improved a bit in Necrom - which isn't that hard after it basically reached rockbottom in High Isle - , but it's by far not as good as it had been in the first few years of ESO.

I have only played 1,5 years, so I only experienced High Isle and Necrom. Both are okay in my book, might need more original content though.

In High Isle, I liked bretons and chivalry, BIG plus. In Necrom I liked tentacles . So there. Both.

I actually rate Summerset & Elswehr equally as the best.

It was really hard to pick between Summerset and Elsweyr, both were great but ultimately the dragons won.

Summerset, no competition no other chapter or DLC can compare to it, it's not just the best ESO content, but the best TES content ever made.

Morrowind for music, map and the most convenient banking/crafting location. Elsweyr is next cause map looks even better.
As for Necrom, it is kinda underwhelming: I hoped for a full-blown peninsula zone, but got dlc-sized one.

No contest. Summerset. No place is more beautifully made. The stories are engaging and just looking at the water cheers me up.

Orsinium, best story telling in the game by far.

It's still Summerset for me, it just ticks all the boxes still, has done since day one. I'd gladly live there in RL if it were possible.

At this point, I would probably got Morrowind > Blackwood > Greymoor > Summerset > Necrom > Elsweyr > High Isle.

I enjoyed most of the things about Morrowind.

Blackwood in my view was mostly bad but, at this point I've had enough fun with Companions that it outweighs it at this point.

Greymoor wasn't that great but, at this point I've had a fair bit of fun with the Mythics that came with the antiquity system that it added.

Summerset was underwhelming for me the first time through but, I've ended up liking it somewhat more since then.

Necrom on the PTS was pretty decent and a definite step up over High Isle but, didn't really feel like it had much lasting appeal for me.

As for Elsweyr, I had a meh time the first time and basically never returned outside of for rewards. My Necromancer is probably the character I've spent the most effort on attempting to build and the least success from both a style and an effectiveness perspective.

High Isle for me was a massive disappointment as I really wanted a more grounded story that wasn't about the end of the world.

There's a few that I really like, its hard to pick a favourite:

Orsinium main quest was excellent, and I agree with others that the groundedness was really great. The worldspace remains amongst my all-time favourites. Orcs are whatever (don't @ me), but I loved that the world-builders built a convincing snowy ecology which managed to be distinct from Skyrim. I'm still salty that the zone eclipsed soooo much of Breton High Rock, and still hoping to see Jehanna one day.

I think that both Hew's Bane and Gold Coast were fantastic. The worldspaces are both very unique and very beautiful. GC was an expertly crafted version of Oblivion's world, with high attention to detail and obviously a lot of love and care. HB's world is unlike anything we've seen, with the sandstone geography and hanging swamps, and to this day the city itself is one of the best put-together, imv. It really feels like a city of adventure. Both also had excellent, grounded stories I really enjoyed.

I think that Summerset was pretty- but I agree with some of the criticisms others have said over the years: to move from Vvardenfell with its rich array of architectural styles reflecting intricate cultures over long periods of time to what we get in Summerset just made the world feel so much smaller. There's nothing to read into in the world. I feel like, with Skyrim, with Morrowind, those games made me want to make Nord or Dark Elf heroes. Pick any area, and they have a distinct story to tell. Alinor, Shimmerene, Lilandril? All the same. I liked the story, but I didn't come away with it feeling like the Altmer were actually badass and I needed to make one now!

Elsweyr's world was gorgeous. Rimmen is breath-taking. The themes "dragons, khajiit, necromancers" were unconvincing and felt contrived, though.

Western Skyrim's world was beautiful too. They really nailed the world-building. Its astonishingly close to the original in terms of detail. The old towers with the conical roofs dotting the landscape were a really nice touch, and it was nice to be in Solitude. I got the same feeling as others have reported with the story, though.

I actually really loved Blackwood; I think the world was very well done (my one complaint is the lack of "forest" in the Niben Forest biome- it felt short of the moody Blackwood forest from Oblivion). But Leyawiin was gorgeous, and it was cool to be able to explore beyond the borders of what we could see in IV. I also thought that the story was quite good, too. It certainly didn't pull any punches.

High Isle's world was, again, gorgeous. The Fauns and the ancestral Breton crypt architecture were HUGE highlights for me. I'd love to see more of both of them in the future. I didn't feel any particular attachment to Amenos or the jungle parts of Galen (though they were beautiful!), and because HI is an island, and I tend to explore going from one zone to the next, I have spent by far the least amount of time here compared to any other place. I hope in the future we get to see some more of these kinds of landscapes in actual High Rock. I agree with many others about the story.

Telvanni Peninsula/Apocrypha has become one of my favourites. I think the character of the Telvanni have been captured very well, and many of the characters have been written (and voice acted) superbly. The Peninsula is nice; the Endless Library is outstanding- managing to capture the essence of what we saw in Dragonborn DLC, and expanding on it such that I feel like I get to explore far more of that than I got in the original. And of course Necrom is one of the most beautiful cities they've done. Its an unfair comparison, but its hard not to look at Necrom and see what Mournhold could have been.