I can tell you put some effort into these interiors, but one thing I’d say about the first building is that the lights are on in the second image. Maybe you would want them on in the first one, but in the second one it’s daytime, and it’s odd that the lights are on. Also, the third image looks very monotone because the inside is basically just one color. The wall is a light muted orange, the window frames and the doors are a darker shade of muted orange, the dresser on the left is light brown. You could improve this by making the front door a darker shade of brown and maybe the inside doors white or something, and maybe change the color of the door frames or the wall so they are different. That might bring out a bit more contrast in the details. Not much to say about the last 2 though. Well done.
Edit: I actually edited the 3rd image to make it look a bit less bland.
Just an example. The windows are desaturated but that’s just because I selected them along with the wooden frames. But just changing the color of the doors alone would improve this. If you’re using textures for the color, then you can’t directly edit the color because the image is taking over it, so you have to press Shift-A > Color > Hue Saturation and drop that between it, then you can tweak that.