All the way open.

Molly usually starts the night off by sleeping in my room, and then likes going to join my parents. Before the morning, she's back in my room.

Mickey comes in from time to time. I don't want one being stuck in there, or stuck outside of my room, so I leave it open.

Like Cataholic, the only time there is a door closed in this house is when someone is using the washroom.