I like the idea of a light in each bed. I also saw some bookshelves countersunk into the wall for each bed that was pretty neat. I like the built ins and also the idea of a bookcase at the foot of the bunk bed.
To loosen up a traditional guest bedroom, add mismatched quilts to twin beds. In this Nantucket cottage, for example, century-old quilts in Pinwheel (left) and Bear's Paw patterns dress the antique wrought-iron beds.