Which direction should house front door face?
Onto the road/street?
I prefer northeast, that way you don't have the sun blasting the front of your house.
which ever direction the front of the house is
It should be in any direction which is easily accessible, easy to approach, and easily be seen to new comers.
East maybe northeast
For AustraliaNortheast for morning sun and not too much exposure to hot afternoon sun from the west.For USA Canada I guess you would face Southeast.search [earthships] for super use of passive heating and cooling.