Design issues...

We have blinds on the windows of our house both front and back, but not at EVERY window. If you put blinds in every window, you can make the house look like an office rather than a home.... We have vertical blinds in our Dining room and Living room downstairs, horizontal wood blinds in the kitchen, and flat blinds in the bathroom and one of the bedrooms. We have street lamps shining into the back of the house from a fairly major intersection, so we have gone for black-out blinds in the rear-facing bedroom.
We have retained curtains in two of the bedrooms to keep a homely atmosphere, oddly enough the one room I use as an office actually has curtains rather than blinds...