The bedroom is where we all start and end our day; it's a place for comfort and relaxation. Your bedroom's decor should suit this purpose, and a big part of any complete room decor is a carefully chosen floor.
While choices like carpeting and hard wood are common, more and more homeowners are choosing contemporary options like concrete or tiling. Of course there are always trade offs between different types, but there are always ways around for determined designers!
It is important to remember that your bedroom floor is one part of a larger design: think about your walls, furniture and use of colour elsewhere in the room when choosing your bedroom flooring. You may be able to benefit from a consultation with an interior designer if you are having trouble.
It is also with remembering that your choice of bedroom flooring does not start and end with the type of floor. You could add to your floor with a rug made of plush, wool silk, shag or even fur or hide.
You could also choose to upgrade your floor with electrical underfloor heating. This can make you feel nice and toasty on cold days, and also lessens one of the disadvantages of choices like tile.