5. A round table. Round tables are much more versatile than rectangular ones. You can use one as a dining table, sure, but they are also brilliant in a breakfast nook, filled with books and sculptures in an empty corner or taking center stage in a large entryway.
This one, from famed decorator Bunny Williams, has been featured on Houzz before (with the oak top), but I couldn't help highlighting it again, this time in marble, because it is simply so stunning.