Wow, thanks for all the wonderful feedback! I've made some of the changes suggested: Brighter ambient for the dining room. Better or worse? I think it's a little too bright now... Floor tile kept for now, but I'll play around with some more textures later. Base paint and floor tile for the kitchen added. Trim and shadows…
I'd like to see the overall lighting be tweaked and really force yourself to make the areas above the lights seem darker than they are currently. I see a lot of scenes with blown out ceilings and there is usually not that much bounce light to illuminate it to that degree. I'd also bump your ambient for your main area, it's…