For me it HAS to be sweet chilli dipping sauce - honestly, it can go on ANYTHING!
At times I have to refrain from dumping it all over my food to save from irritating the wife too much!
Mix it with mayo and you've got a mild sandwich spread or "chip dipping" sauce..... Mmmm!
Ketchup or brown sauce pales in comparison, oui?
Oh, and don't forget oyster sauce - salty fishy goodness, get in!!
Anything else I'm missing out on??