Which way it swings

It should generally open inside so that you don't hit some one in the hallway when you open the door.

I would say it depends on where the bathroom is located. If it's in a common area always in, but if it's "en suite" to a bedroom it can swing out.

Some bathroom doors swing both ways, not that there's anything wrong with that.

On a recent renovation we did a pocket door.

>> Some bathroom doors swing both ways, not that there's anything wrong with that.

LOL

doors that swing inward, in a small bathroom ...

My general preference would be inward. The question you're trying to answer is: Can the door (or fixtures) be arranged so that if somebody starts to open the door to an occupied bathroom, they don't have a chance to see what's going on in there before the current occupant screams or blocks the door? Doors that open out generally don't afford that opportunity.

@Aaron - good call on inwards opening

That said I do prefer pocket doors