If you don’t want the coffee table to be the focus of the room choose one with a glass top and a finish that blends with others in the room as in this example. This will keep the eye interested in all the items in the room not just one layer of the design. Coffee table metal bases with glass tops are another good choice to keep rooms feeling open. They’re also great when you have a special rug and don’t want to block views of it. Keep your glass cleaner handy though as there is no way around fingerprints.
Coffee tables should be the same height as the surrounding seating with 18 inches being a good average (although it will depend on your furniture). If you select a coffee table with a lip make sure the lip isn’t higher than the adjacent seating or you’ll end up hitting your drink against the lip when you try to set it down. The idea is to put your drink down not up.