In certain cases, it is always recommended to go for east facing, as it is most recommended. However, the other directions also hold special value. If not for east, one can opt for a north or west facing as well. They are usually the second most preferred unless they have the best view. South is preferred by many who believe in the science that it holds a good factor for them, which is why many people directly opt for south facing.
All in all, it is best to go for the facing that you really wish for. Consider several factors regarding the view, ventilation, etc. before you go for a particular facing.
However, once the house is built and needs a redesign, the door can be changed to change the facing of the house, if needed and possible. To have an idea about how the interiors can be designed to be more efficient and compliant with vastu, visit out page by clicking here to know more.