With summer fast approaching, it's as good a time as any to make sure you have the best grill to meet your needs. The most common types of grill fuels are gas and charcoal. It is important to know the differences between the types of grills before you buy. "It's two different worlds," said Lu Dos Santos, owner of Alltown Gas Grills & Propane in Weymouth, Mass. "A gas grill is much easier to use, you just start the grill and go about your business." Charcoal grills, however, give more flavor to the meat and are usually less expensive than gas-fired grills. More