It ends up depending upon how the bed is situated in the room. As a general rule, I sleep on the right side, but my fiancee prefers to be by the wall, so if the bed sits with one side against a wall I end up sleeping on the opposite of whatever side that might be. We tried the "bed in the middle of the room" arrangement, and it just too up too much floor space in this tiny little trailer. At the moment, it's situated with the left side against the outer wall, so I sleep on the right.