Pairing the wrong window treatment with built-in seating or a bench can overwhelm the space as a whole. You also don’t want to be getting tabled up in heavy drapes or cords while trying to relax with a good book.
If privacy or light control is of no concern, then consider leaving the window bare. This will maximize natural sunlight in the room and allow your window seat design to stand out as the star of the show.
For windows that need some type of interior covering, sleek blinds or shutters are great options. Or install a Roman shade for a softer appearance that will stay out of the way when the seat is in use.