Most people would agree that the food during a wedding reception is one of the most important things. Some people might argue that the location, entertainment and style are more important, but most people would probably agree that the menu and quality of the food is going to have a large impact on the event, so you can see why getting it perfect is so important to a lot of people.
Wedding menus are often unscrupulously judged by guests so that they can be outdone by theirs, so refining it to meet a variety of tastes is the ideal, which means offering a number of different dishes for the guests. Besides this, taste-testing all of the food to make sure that the quality is high is also very important.
Lastly, a lot of event management companies will have connections to great catering companies, and if you go through them you may also be able to get a great serving staff as well.