Feature tiles are expensive and not always what you want anyway.  When doing my boys bathroom, I decided to make my own.  Tile as if you were inserting a feature and  use the space to mosaic your own design. Looks great, adds fun and colour to the room. 

Remember to not over do it.  Maybe just one in the middle of the room.  I put one in front of the basin and one in front of the shower.  Mosaics are excellent for wet areas as they are usually slip resistant.

Have you used mosaics in your home?