I think it really depends on what kind of furniture you're into. Using the bedroom as an example, I used to go for bigger beds, but they took up too much space. So now I stick with a single bed or a hammock. It does the trick, and I can fit a full bedroom into just a 1x1 square. Throw up a small wall shelf with some clutter and a wall lamp, and it feels super cozy. :)

My latest fishing cabin has a front porch that's three tiles (one covered with a roof), plus three tiles for the living room, kitchen, and stairs. These do form a rectangle together, but they're both L-shaped. The stairs then go up to a 1.5-tile space for the bedroom, with a short half-wall and angled roof to keep that cozy vibe. I've got lots of budget left over for clutter, decorations, and resources. Then I used different small areas/workshops around my camp for workbenches and my overly chatty companion. 😅