As the daughter of a retired architect and a fellow in AIA, I know my father has always preferred southern exposures because of their ability to provide passive solar energy. It also depends however which rooms are facing south. For example, if the kitchen and eating area are facing south, when you wake up on a cold winter morning, those rooms will be warmer to start your day. At the same time, in the evening when you are cooking dinner over a hot stove, the added heat of the sun won't be coming in the windows. Instead of window covering to block the sun, try extending your roof line so your roof overhang is more like 36 inches (check local codes). This also helps keep your windows cleaner!! I live on Lake Norman in North Carolina, so waterfront homes with lake views and sunset views are the most desirable so you have to decide what is most important. You can accomplish both, with the help of professionals! Another great tip that I always bring to my home buyer's attention is that a deck or patio on the west side of the house will be alot hotter for your cookouts and parties. These features work better for late afternoon and evening entertaining if they are on the east side of your home (unless you're fortunate enough to have mature trees that block the sun).