According to a recent article, melons are among the best food values.  They're inexpensive, low in calories, and full of water and fiber, which helps you feel "fuller," despite the fewer calories.   

 
A two-cup serving of watermelon provides Vitamins A, B6 and C, as well as lots of potassium.  

And if you're of an artistic temperament, melons are good subjects for carving.  
 

Andrew Johnson, M.D, co-author of the study conducted at Southmead Hospital in Bristol, U.K. notes that "Surgical treatment, such as laparoscopic gastric banding, is increasingly recognized as the most effective means of achieving weight loss and improving blood sugar control in morbidly obese patients with Type 2 diabetes.  However, until now, the long-term psychological status of morbidly obese individuals undergoing gastric banding has been unclear."