Some very broad impressions:
The major developed cities in Asia are "all the same", more or less, to me, Seoul, Taiwan cities, HK, Bangkok, Singapore, Kuala Lumpur, Dubai, Abu Dhabi, Doha. The last three of course are very hot and "deserty". But all have massive skylines on waterways, vast stretches of 30+ story apartment buildings, very very few "houses", large airports and seaports, Not much in the way or large forested parks (that we saw).
Several places we visited are threatened by potential military actions, Seoul, Taiwan, Straits of Hormuz, plausibly Mumbai. Some places we visited or planned to in the past have been made now off limits by war. It's hard for me to conceive of a real war where a place like Seoul comes under artillery attack, it would be ... brutal, or the two cities in Taiwan being assaulted.
The greatest contrast with cities in India we visited vs the above, is trash, and poverty. In India, trash is everywhere, Mumbai downtown was better. The plastic in the oceans comes from these countries like India.
I saw no gum on sidewalks in Singapore. Ha.
Doha was surprisingly green, a lot of larger tracts of sod. Of the three, it was my favorite to visit.
There weren't any places we both said "We'd love to come back.". A few were in the "like to return" group, but the pain to get there is significant.
We were of course limited by the tours I selected, but had long bus rides in most, and walked about in most. India is brutally humid and hot, even the locals were complaining as it was early April. A thing we missed was having more local food options in places, my wife was pretty leary about trying things. We had a great lunch in Seoul at a market, and an "OK" lunch in Goa, India, and some terrific fried chicken in Doha of all places. As we entered that place, I noted three locals lounging having coffee, and the put my hand over my heart and said "Salaam alekhim". Later they left, and we were told the younger of the three paid for our meal, he said "Welcome to our country". I left a $20 tip for the workers.
These three Arab cities of course fabulously wealthy, clean, and safe. Up to 90% of the population are "foreign workers". It doesn't seem sustainable to me, but the workers face greater hardships in their home countries, places like Pakistan.
We had some interesting conversations with the crew on board the ship. They mostly seem pretty motivated and happy, most told us they were reupping their contracts, and while they aren't paid much and work hard, it's worse where they are from (most off the PI). We took a tour of the "innards" of the ship that was pretty interesting. This is the oldest ship in their fleet (NCL) and smallest and about to be sold as NCL brings on four "megaships". By smallest, I mean 1930 passengers and about a thousand crew. It was updated in 2024 and was in good shape visually. We watched a video about the new ships and they will be ... different.
There are three levels of dining on board, the "Garden Cafe", which is buffet style, and decent, two large sit down and order restaurants, and four "premium" restaurants, one of which is "French". The service at the latter is quite good, we got comped on a lot of stuff. We had five "free" premium meals for each cruise (14 day followed by a 15 day). We did not have the Unlimited Beverage Package which saves a LOT of money. Most folks don't know you can drop that, it's about $75 per person per day.
The passengers were about half Asian, about a quarter European/Aussie/NZ, and a quarter American/Canadian. There were a lot of Canadians on board that we met, they nearly all joked about the 51st state thing.
