Historical Chinese drama, especially the palace intreague ones. The better ones are high budget productions with the most beautiful aestethics and well thought out stories. Instead of seasons with set episodes they just have shows of 4 to 100 episodes. Due to that each issue can take the time it needs to be told, without the need of season finals and such, making the pacing very natural. The better ones are also not always predictable and keep you hooked. Most western dramas can't compare, exceptions like Julian Fellowes' shows asside.

I would suggest watching 延禧攻略/Story of Yanxi Palace (not the spin-off on Netflix!) if you want to give it a try. It's not too old, has a good story, and is quite fast-paced despite it's length, making it a great one for starters. It's also easily available with good subtitles, you can find it on Viki for example.