We have lived in this house for a few years now. We knew from the beginning that we wanted to do something different with the dark and gloomy middle room... It took us a little while to work out what it was that we wanted to do with it. Finally we had an epiphany; found a good builder's draftsperson and a great builder.
Ta-Da!! Natural light and open plan living space.
There is still a lot more to do, but we are getting somewhere. So that is nice.