at first look, I'd put it on the longest wall.

BUT, it depends on what else will be in the room.

I like to look at the bed upon entering the room . How big is the bed? Headboard? windows in the room???

We need a lot more info and windows in your drawing and what spaces are all around this space . The size of your bed for sure . You only have 9' on the long wall so no king for sure