Salt and (malt) vinegar on chips, there is no other option for decent folk.
Ketchup is only acceptable on fishfinger sandwiches, nothing else.
You can always recognise a person of character by their use of sauce.
HP/Brown sauce: indicates a trustworthy soul with whom you could probably trust your latest betting tip
Salad cream: Not a serious person, very unreliable.
Using Oil/vinegar salad dressing: Pretentious and probably not listening to anything you are saying.
French Mustard: Wimp, and probably hoping it's the same mustard that is squirted, unasked, on their hot dog at the cinema. Far too sweet. Avoid these people.
English Mustard: The No.1 of all condiments. Anyone who uses English mustard demonstrates qualities of individualism, integrity and insight.
May I suggest you use this as a guide rather than a mantra. And any additions would be gratefully received.