I'm fascinated by little convertible houses, where all space and furniture is designed to be multi-functional. I'd love to live in one.
Why don't I? Well, as with everything in life, there's some trade-offs. Not only that sort of home needs a lot of time to be designed, you also have to build most of the furniture yourself, as the commercial options are limited. (I think that my most functional piece of furniture is my sofa, that doubles as a guest bed and has storage underneath.) And let's face it, you need quite a bit of resources to make your own furniture, starting with lots of space (at least temporarily).
Well, as it turns out, there is another option: Graham Hill recently designed such an apartment for sale.