-Face west for sunset view. Or east for sunrise view.
-If house has a mailbox and road is busy, make sure mailbox is on house side of the road.
-Enough land to keep me away from neighbors.
Next time I buy a house I'll definitely pay more attention to the direction the "main" side faces. Our current place faces north (gets the least sun here in the northern hemisphere). The deck and concrete gets covered in moss/mold and in the winter it's hard to find a spot to sit outside and soak up the sun.