Worst case scenario, you run out of food at your reception. Whether you are serving cake and champagne, small plates, stations, full sit down dinner, or a buffet, the last thing you want is for your guests to leave hungry.
One way to avoid this is to be clear with your caterer as to your expectations, "Hey, Mr. or Mrs. Caterer, our guests are expecting a full meal, and they eat, so make sure we don't run out of food!"
Sometimes you look a quote for a caterer and notice the prices are pretty low, sometimes too good to be true. And that's because you are expecting a full dinner and they are pricing the meal out as light hors devours.
This would not a good scenario for anyone. So remember to be clear. 50% of your budget will be spent on food, you should get what you are paying for.