If I was building my own home I'd specify a 'telecoms room', basically a cupboard for all the stuff like incoming broadband modems, routers and media servers and it would have wired gigabit Ethernet to every room in the house.

I'd also want ground source heat pump and solar panels for heating and electricity, and spec a high standard of insulation. Oh and brick internal walls.

The rest of the house design is handled by the Mrs...