Big breakfasts are important to stave food cravings and can assist in weight loss

Washington Post - Big, Well-Balanced Breakfast Aids Weight Loss
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ScienceDaily - New Weight Loss Diet Recommends High-carp and Protein Big Breakfast

Researchers asked a group of obese women to participate either in eating a calorie-rich breakfast including meat, cheese, carbohydrates and a little chocolate, or a traditional high-protein low-carbohydrate diet for 8 months. Those on the big breakfast diet ate protein and vegetables for the rest of the day. Those on the big breakfast diet lost over 4 times what the traditional diet group lost and also reported less of an incidence of experiencing carbohydrate or sugar cravings. The theory is that when you wake, you have high levels of serotonin, metabolism, cortisol, and adrenaline, priming your body for food. If you don't eat, your body takes nutrients from muscle tissues and goes into an 'emergency' mode that stores food eaten later as fat. Furthermore, when your serotonin levels dip later in the day, you may get a craving for sweets or chocolate, which raise that level and can create a mini-addiction. Lastly, article mentions a relates study that showed that appetite in overweight women doesn't drop after exercise like it does in lean women, suggesting that the body is trying to maintain that overweight position by getting you to eat more after exercise.

Second article gives more specifics on the Big Breakfast study.