The first time I had a balcony cabin I slept with the door open since I like falling asleep to the sound of the waves.  Then I thought, "What if a bird flies into my cabin while I'm asleep?"  I wouldn't like that since birds sometimes leave behind messing, gooey, and gross "calling cards".  So now I sleep with the door closed. 

 

Has anyone ever had a bird fly into their cabin?  Anyone else here prefer to sleep with their balcony door open?