This even beats the eternal Ketchup vs. Mustard on a hot dog argument. I'm gonna cut right to the chase. I've used both for decades. I probably eat & weigh more than you - so eating is something I'm confident I know more about. I'm not "call the Fire Department we gotta remove a wall fat" - just a size you'd feel comfortable taking grilling advice from.
Gas wins hands down. Don't give me the "charcoal taste" argument. A good broken in gas grill delivers the same exquisite outdoor taste as charcoal - with 1/5 the mess. Charcoal lovers love the charcoal "process." It's the stacking the brickettes, lighter fluid, waiting for the coals - process. It's the whole ceremony of charcoal you're addicted to, not the taste. You're convinced the "process" makes the food taste better - and it might - in your mind. In reality all you accomplish charcoaling is getting your fingers black from the briquette stacking, and burning your eyebrows from the "whoosh" at light up. I just press a button.
While you're waiting for the fire to get hot - I already have meat on the grill. When your chicken is half done, I'm sitting down to eat my chicken. When you get around to eating your chicken, I'm already asleep in the chair.
Why don't you have a gas grill? I know why. Don't lie to me or try to lie to yourself. You're just too cheap to buy one.
Go ahead, keep your charcoal grill. I smell your eyelashes burning already.