"Taste the meat, not the heat."
I love the taste of a charcoal-grilled steak. I'm willing to put up with the inconvenience.
The taste comes from grease dripping into the fire and smoking back up. You get that with propane.
You can get even more smoky taste from a handful of wet mesquite or hickory chips in the propane grill.
If you did a blind "Pepsi challenge" on propane grill vs. charcoal no one would be able to taste the difference, unless a DUmmy has poured too much starter fluid into the coals.