I have a gas barbeque that I just LOVE to cook on.  
Really? Direct heat grilling is a great way to cook!
I love to cook tri-tip on it.
Barbecue
Barbecue or barbeque (informally BBQ or the Australian term barbie) is a cooking method, a style of food, and a name for a meal or gathering at which this style of food is cooked and served.
A barbecue can refer to the cooking method itself, the meat cooked this way, or to a type of social event featuring this type of cooking. Barbecuing is usually done outdoors by smoking meat over wood or charcoal. Restaurant barbecue may be cooked in large, specially-designed brick or metal
Indirect grilling
Indirect grilling is a barbecue cooking technique in which the food is placed to the side of or above the heat source instead of directly over the flame as is more common. This can be achieved by igniting only some burners on a gas barbecue or by piling coals to one side of a charcoal pit. A drip tray is placed below the food to prevent fat from the food igniting and generating a direct flame. Indirect grilling is designed to cook larger (e.g. pork shoulders, whole chicken) or tougher foods