answer:I think I’d feel awkward saying, “Please may I have…” to a server in a restaurant while ordering food. I don’t see why “I want…” is rude. I usually say, “I’ll have the…” while ordering and, “Could I have…” when requesting something like cutlery or ketchup. I also thank them quite often. Still, “Please may I have…” seems like a bit much. Unless he’s being overtly rude, let him order however he wants to.