Closed, I'm 2nd shift so my wakeup time is late enough I have to block all sunlight.

Open, so I can see and hear out.

Winter: Closed. It can get to -25C where I live, and I need to sleep with the window open. I don't want the rest of my house ruined with the door open.

Summer: depends on the heat. If OK, closed. If too hot, door ajar

Door half open so the cats can walk back and forth, but not so much that it’s too light in the morning.

Open. If my kids need help and call out in the middle of the night, I would like to hear them!

Closed cause I don't want to deal with people walking around late at night with lights on or the cats waking me up.

Open, lets the air circulate better

open, I need the connection to the rest of the world.

Closed in the winter, Open most of the summer so that the whole house fan can pull air in and through the bedroom cooling things down.

I keep mine slightly open and make sure there is a window open in my room and in another room to create a breeze

Open. I want to hear if anything happens in my house.

Closed, because fire... https://youtu.be/PYvF5oxSXZc

Fire vs CO2 buildup. I guess door closed, window open could be the way?

Ajar

closed unless it's hot. closed gives me privacy and quiet and makes it darker, but if it's too hot having it open gives me better airflow.

Open but these fire comments have me reevaluating

I prefer closed, but since our cat moved in, the door has been left ajar.

Open because of the damn cat. We love her though.

Open slightly so I can let air flow my room from the window

Door open if it's hot, usually with the fan pointing out the door. If it's REALLY hot, fan directly on me.

Depends, if it's hot enough to need the AC, door closed. If not, door open so I can open the window and get some airflow.

Door closed, all the time. In case a cat gets in. But I’ve always slept with the door shut, in case monsters get in.

Open to keep the Monsters out, closed to keep the Monsters in.