Well, you need an overhang to protect the interior of the door if you live where you have curtains/blinds or whatever. I think it ight also a security issue if someone was trying to force the door. Your hinges will be outside and someone could remove the pin and remove the door but that is no issue at all if you use security hinges like every commercial hinge around.

When I was designing my place I asked a LOT of folks why residential doors swung in and commercial out and never got a good or logical answer re: the residential. For me, I want out easier in a fire, and I have several areas with double doors and other things inside near the doors where it's more convenient to swing them out folded against the exterior wall rather than inside covering light switches or a hat-rack/umbrella stand or what have you.

An out-swinging door is just more convenient.

Edit: The screen door/storm door issue would be a strike against out-swinging doors.