This looks way way way better than my castles, which are basically stone blocks with teeth. It's why I mostly stick to the tried-and-true Crappy Wooden Rectangle™ houses nowadays.
Anyway, this pretty castle. It was built by Xidus933, who's submitted several castles to r/minecraft in the past -- this being the most recent and most well-received. Xidus tries to go for designs that are both utilitarian and aesthetically pleasing, or, in their words:
Something that does nothing but look good -- "eggshell builds" -- does not impress me. My builds look good, and are also 100% viable in Survival, although this particular build was constructed in Creative for easier prototyping. I also prefer the more militaristic fortress-style castles than the whimsical fortified manor houses that later castles developed into.
I particularly like how in the granary, Xidus used netherrack blocks for the hanging meat slabs, with dabs of redstone dust standing in for blood. Clever.