I think it would be nice if advanced block builders could open up a new skill line called 'Furnishing', allowing them to create a number of furnishings for other players houses. This would be pretty big update, since it would involve new items and such, but I think it would be a great addition.
A few suggestions for furniture items they could make:
Beds - Various qualities and designs. They would provide Glitcheans who log out in their homes an energy generation buff if at least one full game day(4 hours) have passed since they were last on. Very basic models would provide maybe 2 energy every 10 seconds for 10 minutes after logging on(for a total of 120 energy). Higher end ones could provide as much as 5 energy every 10 seconds for 20 minutes(600 total) and may even provide a short lived 'Cat Nap' buff once per day upon use, which would make all actions cost only 50% energy for 2 minutes(heavy crafters would love this!).
Larger storage units - Yes, we can just dump junk all over the floor, but wouldn't it be nice to not have to? These storage units would just be larger vaults for our things. Very nice ones may even allow us to stack the same items into larger stacks(like 300 meat a space as opposed to 60).
Radiation Containers - While off line and at home, any possible energy that could have been gained via meditating would be saved up saved up to a certain limit. Based on the quality of the container, the maximum limit and what percentage of possible energy is saved would differ. This would require the owner to have Transcendental Radiation to work.
Automatic butter and cheese makers - One of the biggest issues with cooking at the moment is how expensive butter and cheese are to make, energy wise. An item like this would allow players to toss in milk, butter, cheese(or any cheese variant) and wait for the next game day to collect it would be highly prized. The better the model you own, the more you can put in at once. Very high end models would even have an auto-filling storage compartment; just toss in a few stacks of milk, let it go through the stacks one by one, and even if you are off for a glitch-fortnight(a couple real days), you won't lose any of that valuable, and energy-free, butter making.
Random odds-and-ends just for decoration, fun, and hanging out with your friends - Couches, aquariums, wall hangings, rugs, scarecrows, disco-balls, alarm clocks which play a set musicblock when even you get home or log-on, whatever else anyone can think off. All just for the hell of it and for the fun that comes with customizing ones living quarters.