I may have offered this suggestion for a forum topic, but I am myself hard put to determine a favorite, or three. So here's a few I will list:
3. While it is not an anime series, I have always had a special love for the world of the classic Ghibli movie
NausicaƤ of the Valley of the Wind. It is a post-apocalyptic world set a thousand years after the 'Seven Days of Fire', and has since reverted to feudal states where all must contend with lingering zones of toxic forests with giant insectoid megafauna. I mainly like the civilization's reliance on imaginative flying machines to travel between locations.
2. In discussing the topic, I humorously mentioned "Water World", the post-apocalyptic Hollywood flop form years ago. This brought to mind the scenario of
Suisei no Gargantia (Gargantia on the Verdurous Planet), an anime that I like, because it does Water World
far better, with a much more satisfactory setup and better story.
1. I have a revolving set of top favorites, which changes from time to time. At present the one scenario I still enjoy, being a fan of Urban Fantasy, is the world of
Cop Craft, where the world is drastically altered culturally due to the discovery that the otherworld of fantasy exists, and Elves are real. Simple for the most part, but the subtle ways this affects what is essentially a cop procedual storyline I enjoy very much. I wish they'd make more of this series.