Currently circulating through fan circles, a few genres dominate because they reliably serve specific reading moods. Modern workplace romances are huge, especially those with a cold CEO and a sweet, capable secretary dynamic; 'Mr. Dior' is a perfect example that blew up recently. The historical or palace drama ones, often with transmigration or revenge plots, also pull in massive crowds because they mix power dynamics and intricate costume aesthetics. I also see a ton of high school/university settings, which are less about angst and more about that sweet, fluffy first-love feeling. It's interesting how the popularity often follows a pattern—something gets big on a platform like Bilibili Comics, and suddenly every creator is doing a variation.
The darker, more psychological stuff like thrillers or mafia-themed stories have a dedicated but smaller fanbase. They're not for everyone, but when done well, the tension is incredible. I think the popularity really hinges on the art style too; a gorgeous art can make even a tired trope feel fresh.