Mine opens out for a couple reasons.
-the locking mechanism that I made is just a bar that comes down in front of the door, if the door opened inward, there would be quite a bit of added complexity to being able to lock from the outside
-don't want to hit a chicken with the door or potentially knock something over inside the coop
-the area that this coop sits gets a good deal of wind, with the wind blowing on an outward door as it currently is, it just kinda holds the door shut. This is opposed to blasting the door open while I am working in there - potentially hitting me, hitting a chicken, knocking things over or even damaging the door
Now, to the point of people worrying about the door getting snow blocked - There was some decent modifications to the ground that had to be made in order to mitigate water getting into the coop, so effectively this door is about 1 foot up from the former ground. It hasn't had a real snow yet, but I expect that it shouldn't be too bad in the winter. Further modifications may be made to this door so it splits about a foot up the current door and I just need to step over it. This would mitigate upwards to 2 feet of snow... and if we had that much snow, a door opening is the least of my worries.