Hidden house (secretly: Operation Hobbit Hole) - a well-sheltered underground house with hobbit-style entrance. I would love to live in a hobbit-like house. It would be built completely into the hillside and underground. And so well hidden.
An over-grown garden can give a sort of romantic feeling to the house, and when the vegetation hugs the walls, it not only provides shade through the windows, but it is a lovely view of natural surroundings.