I'm focusing on the rooms to the right and left and on the second floor because they were my favorites.
First off, the study.
I looove the lighting here. It feels warm and lived in while still making it seem like there could be something lurking in the shadows... I love the simplicity of it too. Very Bly Manor.
Next, my favorite, the theatre.
The way my jaw dropped when I saw this! So creative! I literally have never seen anything like it.
I don't even know if the screenshot does it justice. The atmosphere in this room alone is worth the whole trip I'd say. With the little street organ and the big organ, the curtains, the lights, this looks like it was taken straight out of a horror video game. Honestly it wouldn't have surprised me if some creepy little puppets came out from behind that tree standee to sing me a creepy little song.
I love love love this room.
Finally, the second floor room with it's immaculate Frankenstein vibes.
This is the best inside=for-outside room I've ever seen. Again, the lighting is perfection, and the drama of the stormy-night wall makes it feel very wet and muddy and like you just wanna finish digging up this corpse and get out here, Igor!!! (That was a Young Frankenstein reference, sorry for that)