Inside the bathroom itself, the doors on individual stalls usually open inwards. One pragmatic advantage of this approach is that if the door opens while you are seated, you can push it closed without getting up. Or requiring help from someone else outside. This also drives the use of push-in-pull-out handles.
One major disadvantage of this approach is that if you are coming in with a bulky bag, or more (hauling carry-on luggage in an airport for instance), you have sharply limited space within to maneuver you and your stuff to a position where you can lift your skirts and do what you came here to do. Every time I go to a public bathroom with stall doors that open outward I am delighted.
