At collage for the next few years? Sure you can put up a few posters in the dorm, but you can’t change too much else. But you can change the curtains or the blinds. If there’s already a blind in your room you can probably substitute your own custom blind for the duration of the semester. Sick of dull off-white; put up a beach scene or that poster from Casablanca, or a mural of Escher. Probably not hard to conceal either; just roll up the blind during room inspection.
You can stamp your own style on the room, and still know that it’s removable in half a minute. More than just aesthetics the right atmosphere makes all the difference to study, to feeling right, to sleeping well. Order a summer and winter blind and compensate for different seasons. Block out the UV light and the real world, and bring it back at the flick of a wrist.
Your taste in décor will change over time, but blinds can be updated so easily. Replace the superhero theme that looked so good when you were young and embrace whatever suits you for the moment. The decision to have a blind can stay, but the picture you choose to display is far from permanent. Unlike wallpaper which can only removed at great effort (and never used again) a blind is easily replaceable with a different blind; and there’ no reason not to back to an earlier one, or use it for the children’s room, if that’s what you want.
History of blinds.