If your floor is clearly visible, and not cluttered-up - as is the case in many modern apartments, that have a large amount of furniture stuffed into minimal space - you might want to consider the idea of tile floor patterns.
What is a Tile Floor Pattern
A tile floor pattern, as is obvious from the name, is a pattern created by flooring tiles, laid down in a particular manner. These patterns can be complicated and spectacular, as seen in many of the floor mosaics found in ancient structures - if you are ambitious enough, and have enough empty space, you might want to try replicating some of the better known designs - no matter how complicated the design, you're certain to find help and instructions online.
Various Tile Flooring Patterns:
Of course, you can install tile flooring patterns even if you don't have a lot of floor-space visible; it simply needs to be subtler. You can use a one-tile or two-tile pattern to break up the monotonous stretch of monochromatic tiles. Or you might even want to create a small design in the middle of the room, which can serve as a centre for all your furniture - maybe a simple floral design, or curlicues might work, or you could purchase patterned tiles and set them down in a completed picture. These tiles are available in packages at almost any store that sells floor-tiles and/or wall-tiles; some of them have the pictures of various divinities, and several other designs and pictures are also available - landscapes, for instance, and cartoons; think how brilliant a Disney figure would look on the floor of a child's room.
Conversely, and regardless of space, you might want to indulge in something that will not take the eye away from the rest of the room, but will, at the same time, heighten the elegance of your décor. You can use tiles to create a border around the room, adjacent to the wall. This can be done in a colour that is a match for the colour used in the skirting of the wall, thus making it appear an extension thereof. However, you can certainly also use various other tile flooring patterns - a Greek Key design will lend your room a certain attic charm, where a bright colour can relieve the sobriety of your décor easily; a scarlet tile floor pattern, for instance, on an otherwise-grey floor.
Tile flooring patterns can be as varied as the installer's imagination, and, almost inevitably, they make the room they grace look striking.