Great input everyone and thanks Nienna!
I was just about to comment on what Vya van Velaris said. HDC has a very broad definition of historical dramas - ranging from real historical/period to the Republican era.
I am all for a very customized list, but maybe something broader to begin with? I am concerned not everyone is well-versed in whether a drama is based on a real historical figure/dynasty/kingdom, etc. I watched so many and I am still confused sometimes. Otherwise, I will have to read up on every drama I watched to know which category to place them in.
What about (not exactly the names of the categories):
1. Political/Imperial - e.g. 6 Flying Dragons, Story of Yanxi Palace, Story of Ming Lan
2. Wuxia + Xianxia - e.g. 10 Miles Peach Blossom, Who Rules the World, Sword Snow Stride
3. Other/Republican - e.g. Rebel, Mr. Sunshine