You apply the prepasted paper to your wall and when you want to take it down you simply grab the corners at the top of the strip and pull it down. The wall does not need to be repainted or anything. They also have wallpaper with different textures that is designed to be painted on. That way you can paint any color you want and when you move you just take down the wallpaper.

For a beach house we designed in the Hamptons we encountered wood floors. We painted them white to brighten up the cottage and deal with the flooring

To paraphrase Corbusier, architecture is the play of light on form, and I think that's the reason I love white. Its luminous quality unifies space.