I love my gas grill. I'm sure if I used charcoal, I could get better flavor but I'm sure I wouldn't cook as much. Charcoal grilling is not as easy or fast as the gas grill. The fuel is bulkier and more trouble to store because of it's volume, the ash needs to be disposed of and lighting a fire in general is more time consuming. I'm sure a lot of guys here can get a fire going quickly but it's hard for me to believe that you can have your grill blistering hot as quickly as I can my Genesis. Don't forget to consider, the grill needs to get hot enough to burn off the last cooks remnants on the grate before you can scrape it clean and it also has to get a heavy set of cast iron or stainless steel grates hot enough to put some grill marks on it. You have to consider all the work that goes into a fire and then I think a gasser wins in terms of time and convenience.
I have a Weber kettle and I will agree that the charcoal fire imparts a nice flavor, however, for the convenience I'll boost the flavor with spices and sauces and use the gasser. As was already said, it's way better than not grilling at all. For those of you who are adamant about using charcoal, I sincerely respect that. You are indeed masters of a craft. Me - I just want to eat and I do so pretty well.