Using your arrow position as a reference:
Any intruder who is going to threaten occupants of the apt would likely have to cross your line of site at some point. I wouldnt care about them being able to see me, I would care more about me being ready and seeing them first. If they are moving and you are stationary, that would lend to the belief that you will probably see them first. If it were me, I would choose the same position that you did.
If I had a suggestion, it would be to upgrade all the doors to solid wood with good locks and re-enforced strike plates.
Life is a web woven by necessity and chance...