It's not really feng shui but (some) Thais also worry about your good luck being blown out the door if front and back doors are in a direct line, so we did have to keep her happy there. And we have to have an odd number of steps up to the front door. And make sure the bed is not facing in the "corpse direction", and that her Buddhas won't be looking toward the toilet, or towards our bed. Apparently Buddha has x-ray vision, can see through walls and might catch us doing something.