Scott
Natural gas is becoming more and more scarce as the supply dwindles with no new reserves being discovered, and therefore the price continues to increase. I'd avoid natural gas if at all possible.

mongo862001
i depend upon what is available to use. if your house is heated with natural gas and you want to spend the money to have a professional plumb it in. other wise propane is sold in the 20# bottles and you have to exchange them when they go empty.

ascarta2
charcoal, its the only way to go you loose so much flavor when you go with a gas grill.

Shabatel
I think u get better flavors with charcoal grill but propne grill is wats doing it now.