Pattern seems to take up space. Large patterns are best used in large rooms.
Large rooms can take more pattern than small rooms.
Generally, the more pattern in a room, the greater the sense of coziness. Think of deep rugs, or your fur throw. Soft carpets and fabrics convey a sense of warmth, intimacy, and privacy. You could also get away with a room-sized rug, but avoid area rugs. Pale neutral or cool colors.