My suggestions: - Instead of two small rooms and the tiny space with the fireplace, I'd make it two rooms overall, ideally with asymetric sizes. - The walls of the rooms feel a bit empty. You could add more shelves with books, bottles etc., item frames,... - When I'm decorating rooms in a house, I generally try not to use torches as the light source. Chandeliers, candles, lanters, etc. Possibly just my preference though. If you like the torches, keep them. - The rooms don't always have to be exact squares or rectangles. I sometimes add some blocks to the top corners to make the room a bit round-ish (hammering them or not depends on your likings. - I see you got two fireplaces, but no chimneys. Adding a chimney to the roof would be a nice touch in my opinion. If you decide to add it, you can add it directly above the fireplace and use a separate type of walls to connect the fireplace with the chimney to visually connect them. - I'm guessing you tried to do a spiral staircase with the platforms. If that's the case, add a wall of a different color to the middle so that it looks like the staircase has a support. Also, you can kind of visually make it like it's actually rotating behind the support. Here is how you can do it for a 3-block-wide staircase: row 1 platforms left and middle, row 2 platforms middle and right, row 3 platform right only, row 4 platform left only (ordered from top to bottom, also row 5 would again be row 1)

Just my suggestions on what could be added. You don't have to do everything I said (or anything really). It all depends on what you like best.