A lighting fixture is the best way to set the mood and warmth of the room, and so it's important to make sure you do your homework on what's best for your home.
What kind of home and dining area do you have? A classic decor? Is it modern? Contemporary? These are all things you need to think about and closely examine to make sure you choose the right lighting fixture.
If you have a classic style dining area with hard oak and traditional furniture you may want to consider a more classical light fixture.
Pick something that fits.
What kind of mood do you want to set in the room? Are you trying to go for a warm feeling or a more chic and energetic room? Not everyone has a family of four and wants the warm, cozy style of room so this is important to evaluate when choosing the right fixture.
Also, how much do you want to spend? Some dining room light fixtures can cost just a little over a few hundred dollars while some range into the thousands.
If you want to set the right mood and feeling while maintaining quality, shoot for a balance of all important characteristics.