Apartment Therapy featured this bedroom a while back as part of a house tour. I love it. I can't stop people from using patterned bedspreads, but I can at least point out how to do it correctly. The walls are a clean color, so the bed becomes the focal point of the room: there really isn't a lot competing for your attention. The blanket adds more color and keeps the room from feeling too dark. At the same time, it covers up the pattern, which keeps that from dominating the room too much. This is how you do it, so take note.
And then, we get to these rooms.
What we have on the walls is the graphical equivalent of an acid trip. Often kitschy, full-wall graphics can sometimes take your mind someplace else. Why you'd want to be taken to a place where you think that your face is melting and strawberries are out to get you is another matter.