One of the decisions I made in my garage conversion was to have an outward opening external door.
This is, as I understand it (at least in the UK), unusual. It was mainly an attempt to maintain as much internal space as possible.
There are issues, the hinges are outside and so subject to attack, which is why I have "hinge bolts" in the door frame. Also, when someone calls, you end up opening the door in to them (rare as I have a window).
But I noticed whilst watching Stargate SG1 Revisions that all of the town had doors that opened outwards like mine - possibly because the rooms are all small.
They are filmed in a place called Fantasy Gardens which is used in other Stargate episodes, and actually, a lot of films!
Fascinating place it seems, albeit torn down now!