Dining rooms, especially those with large tables, are mainly used for entertaining and that's exactly why it's so important to make a statement. Whether you're going for big and bold or sweet and simple — the dining room table is typically front and center. An always-popular shape for dining room tables is rectangular. Long rectangular tables are a good choice for large families or those who love entertaining— they often provide ample room for large groups as opposed to square or round tables, as long as you have the luxury of the square footage needed to accommodate the longer, narrow shape.
Of course there's no right or wrong, merely a choice that can easily be made when taking the size of the dining room, number of family members and how often you entertain into careful consideration. Just don't forget - the most important thing that you need is the willingness to make the space welcoming to whoever is lucky enough to be invited over!