Like a white peaceful vibe...sheepskin rugs add a nice soft touch.
Soft greens and blues also create a relaxing palette.
Love red and your tastes tend to be more traditional than the typical IKEA room?
Or are do you prefer much bolder splashes of color?
Of course these rooms are pretty minimal and I'd definitely use the wall space more creatively, but I get their intent. Take a look at the main IKEA US site for even more bedroom transformation ideas.