I have been in thousands of houses, apartments, townhouses, cabins, mobile homes and RVs. Have only ever seen outward-opening doors on RVs and eight-wide mobile homes (old and trace their lineage directly to travel trailers). If you've ever RV'd you know one very good reason for inward-opening doors: wind. A wind-whipped door can be deadly to either people or property. That is why storm doors have chains and closers but a big wind can tear that stuff off and whip the door against the house. Only in a well-protected area would I consider an outward-opening door.