What are the most striking spiritual and cultural phenomena or characteristics after 1980s?

What is the generation after 80? They always feel lonely and have nowhere to run; They are nostalgic and like to collect bits and pieces about their growth process; They behave like men. In front of acquaintances, they are hysterical, but in front of strangers, they say nothing. Many of them belong to otaku and otaku, and half of them live online; They are used to staying up late, believing that the later the better; They refused to grow up and suffered from Peter Pan syndrome. Love karaoke, KTV is their frequent entertainment place; They began to become leftover men and women, either on a blind date or on their way to a blind date; They are keen on studying horoscopes, and know how to appreciate, cherish and reject vulgarity. ...

This paper is very big. If you want to write well, you should first consider the life background of the post-80s generation and analyze the great social changes they have experienced in their lives. Thirdly, you should consider what kind of culture they like, such as who they like in literature, what kind of songs they like, what they like to do online, and so on. After such analysis, their mental characteristics soon came out.