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.
Lew, Good point about the wind - I have lived in a very windy area (North Dakota) where this is an issue. I have had numerous closers and chains ripped off during storms and blizzards over the years, I have even seen storm doors ripped off of their hinges (one time). Where I live now in Georgia, we don't have those kind of winds. Perhaps being under a porch with buildings adjacent, the wind will not be as much of a problem. Thanks for that observation!