I hate when you go to restaurant and they bring you stake absolutely tastless and tell you to salt to your taste. Can't stand that. It's like eating steak with some salt on a side. To me you must season meat before grilling, then it taste good.
Crankin - I will often times not salt the meat put on the grill. If you use a rub, or marinade, and/or inject with a seasoning, or brine a piece of meat, salting will not add to good flavor.
Just do some research on the differnet methods. Also, if you use a rub, it does usually inclde a salt of some type, the same as brining does.
As far as flavoring is concerned, it is a common asian practice (and elsewhere) to add MSG to the cooking. Is that a good thing? I do not think so, but it is worth while for you to research that practice also. Both salt and MSG are normal additives for cooking as it can enhance flavor. But good food, cooked well in my opinion does not need either.